LongSung Technology U5501 HSDPA Module User Manual U5501

LongSung Technology (Shanghai)Co.,Ltd. HSDPA Module U5501

User Manual

U5501_Hardware_User_Guide_V2.3 Page 1 of 59 U5501_Hardware_User_Guide _V2.3
U5501_Hardware_User_Guide_V2.3 Page 2 of 59 IMPORTANT NOTICE COPYRIGHT NOTICE Copyright©2010, LongSung Technology (Shanghai) Co., Ltd. All rights reserved. TRADEMARKS LongSung Technology (Shanghai) Co., Ltd’s products are exclusively owned by LongSung Technology (Shanghai) Co., Ltd. References to other companies and their products use trademarks owned by the respective companies and are for reference purpose only. CONFIDENTIALITY The information contained here (including any attachments) is confidential. The recipient here acknowledges the confidentiality of this document, and except for the specific purpose, this document shall not be disclosed to any third party. WARRANTY DISCLAIMER LongSung Technology (Shanghai) Co., Ltd makes no representations or warranties, either express or implied, by or with respect to anything in this document, and shall not be liable for any implied warranties of merchantability or fitness for a particular purpose or for any indirect, special or consequential damages. NO GUARANTEE Our company will not take any responsibility for any damage caused by the customer’s abnormal operation. Please refer to specification and designing reference guide. Our company have right to modify the document according to technical requirement with no announcement to the customer.
U5501_Hardware_User_Guide_V2.3 Page 3 of 59 CAUTION: U5501 HSDPA module is an ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 1 K Volts readily accumulate on the human body and test equipment and can discharge without detection. Permanent damage may occur on devices subjected to high-energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. Warning: The U5501 module is designed to comply with the FCC statements.FCC ID is XHZU5501.The Host system using U5501 should indicated “Contains FCC ID: XHZU5501”. This device complies with part 15B of the FCC rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference (2) this device must accept any interference, including interference that may cause undesired operation. Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user's authorityto operate the equipment. This equipment complies with FCC/IC radiation exposure limits set forth for an Uncontrolled environment.This equipment should be installed and operated with minimum distance 20cm between the radiator and your body as well as kept minimum 20cm from radio antenna depending on the portable or Mobile status of this module usage. The manual of the host system,which use U5501 must include RF exposure warning statement to advice user should keep minimum 20cm from the radio antenna of U5501 module depending on Mobile status. The U5501 module can not be installed with other radio .such as co-located or operating in conjunction with any other antenna or transmitter. Antenna Type: Connector Antenna Gain: GSM850:1.2dBi;GSM1900:1.2dBi.
U5501_Hardware_User_Guide_V2.3 Page 4 of 59 Contents 1. Overview ..................................................................................................................................8 1.1. Purpose of the document.......................................................................................8 1.2. Summary......................................................................................................................8 1.3. Correlative documents ............................................................................................8 1.4. Document’s history...................................................................................................9 1.5. Abbreviations..............................................................................................................9 2. Introduction...........................................................................................................................11 2.1. Key features..............................................................................................................13 2.2. Operating modes.....................................................................................................15 2.3. Hardware functional block diagram .................................................................16 3. Application interfaces description.................................................................................18 3.1. 116-pin LGA PAD.....................................................................................................18 3.2. Power supply.............................................................................................................22 3.2.1. Power Supply and reference design.....................................................22 3.2.1.1. VBAT input .........................................................................................22 3.2.1.2. VRTC input .........................................................................................23 3.2.1.3. VOUT voltage output......................................................................24 3.2.1.4. POWER_ON_OFF input ..................................................................24 3.2.1.5. RESET_N input .................................................................................25 3.2.2. Power on/off time sequence ...................................................................26 3.2.2.1. Power on time sequence ..............................................................26 3.2.2.2. Normal power off time seqence.................................................26 3.2.2.3. Low power to power off ................................................................27 3.2.3. Reset time sequence..................................................................................27 3.3. USB interface............................................................................................................28 3.3.1. USB interface description.........................................................................28 3.3.2. USB reference circuit .................................................................................28 3.3.3. USB driver......................................................................................................29 3.3.3.1. Linux OS load USB driver for U5501 .......................................30 3.3.3.2. Linux OS AP use AT to control U5501 .....................................32 3.3.3.3. Linux OS AP dial PPP connection...............................................34 3.4. UART interface..........................................................................................................37 3.4.1. UART interface description ......................................................................37 3.4.2. UART interface reference circuit............................................................37 3.4.3. UART interface description ......................................................................38 3.5. U5501 sleep and wakeup control......................................................................38 3.6. Analog audio interface ..........................................................................................39 3.6.1. Analog audio interface description .......................................................39 3.6.2. Hands-free channel ....................................................................................39
U5501_Hardware_User_Guide_V2.3 Page 5 of 59 3.6.3. Handset channel..........................................................................................39 3.6.4. Analog audio reference circuit................................................................40 3.7. PCM interface............................................................................................................41 3.7.1. PCM interface description.........................................................................42 3.7.2. Auxiliary PCM................................................................................................42 3.7.3. Primary PCM..................................................................................................44 3.8. USIM/SIM interface ................................................................................................45 3.8.1. USIM/SIM interface description.............................................................45 3.8.2. USIM/SIM interface reference circuit ..................................................46 3.9. Status indicator interface.....................................................................................48 3.9.1. Status indicator description ....................................................................48 3.9.2. Status indicator reference circuit..........................................................49 3.10. GPIO ..........................................................................................................................50 3.11. Antenna interface .................................................................................................50 3.11.1. Solder antenna ..........................................................................................50 3.11.2. RF connector...............................................................................................51 3.11.2.1. RF cable ............................................................................................52 3.11.3. U5501 RF output power .........................................................................52 3.11.4. U5501 RF receiver sensitivity ..............................................................52 3.11.5. U5501 operating frequencies...............................................................53 3.11.6. Antenna parameters requirement......................................................53 4. Mechanics...............................................................................................................................54 4.1. The view of U5501..................................................................................................54 4.2. 3D stack......................................................................................................................54 4.3. 2D mechanical dimensions..................................................................................55 4.4. Application side library of U5501......................................................................55 5. Power consumption ............................................................................................................56 6. Electrical characteristics ...................................................................................................57 6.1. Absolute maximum power ratings....................................................................57 6.2. Operating temperatures .......................................................................................57 6.3. Interface operating status ...................................................................................58 6.4. Reliability....................................................................................................................58 6.5. Electrostatic discharge ..........................................................................................59
U5501_Hardware_User_Guide_V2.3 Page 6 of 59 Tab les Table 1：Document’s update history...........................................................................9 Table2：Abbreviation and description ........................................................................9 Table3：Key features of U5501...................................................................................13 Table4：Overview operating modes ..........................................................................15 Table5：U5501116-pin LGA PAD pin definition.....................................................19 Table6：U5501 Power supply correlative interfaces ...........................................22 Table7：U5501 USB interface ......................................................................................28 Table8：U5501 UART interface ....................................................................................37 Table9：U5501 sleep and wakeup interface...........................................................38 Table10 ：U5501 analog audio interface description ...........................................39 Table11 ：U5501 second channel audio....................................................................39 Table12 ：U5501 first channel audio..........................................................................40 Table13 ：Auxiliary PCM and Primary PCM configuration...................................41 Table14 ：U5501 PCM interface ...................................................................................42 Table15 ：AUX_CODEC time sequence parameters .............................................43 Table16 ：PRIM_CODEC time sequence parameters............................................45 Table17 ：U5501 USIM/SIM interface ........................................................................45 Table18 ：U5501 status indicator description.........................................................49 Table19 ：U5501 status indicator description.........................................................49 Table20 ：U5501 GPIOs ..................................................................................................50 Table21 ：U5501 antenna interface............................................................................50 Table22 ：U5501 RF output power..............................................................................52 Table23 ：U5501 RF receiver sensitivity...................................................................52 Table24 ：U5501 operating frequencies ...................................................................53 Table25 ：U5501 antenna parameters requirement ............................................53 Table26 ：U5501 max current consumption in some mode..............................56 Table27 ：Absolute maximum power ratings..........................................................57 Table28 ：U5501 module operating temperature .................................................57 Table29 ：Digital Signal DC Characteristics.............................................................58 Table30 ：U5501 power supply range .......................................................................58 Table31 ：Requirements on the environment reliability.....................................58 Table32 ：The ESD endure status measured table...............................................59
U5501_Hardware_User_Guide_V2.3 Page 7 of 59 Figures Figure1：U5501 Hardware functional block diagram .........................................16 Figure2：U5501 116-pin LGA PAD pins sign..........................................................18 Figure3：U5501 Power supply VBAT input .............................................................23 Figure4：VRTC connect to rechargeable battery..................................................23 Figure5：VRTC connect to non-rechargeable battery ........................................24 Figure6：VRTC connect to large capacitance capacity.......................................24 Figure7：POWER_ON_OFF reference circuit ..........................................................25 Figure8：RESET control module reset......................................................................25 Figure9：power on time sequence.............................................................................26 Figure10：U5501 power off time sequence ...........................................................27 Figure11：U5501 RESET time sequence .................................................................27 Figure12：U5501 USB reference circuit ..................................................................28 Figure13：U5501 UART connection...........................................................................38 Figure14：U5501 analog audio reference circuit .................................................40 Figure15：AUX_PCM_SYNC time sequence............................................................42 Figure16：AUX_PCM_CODEC to U5501 time sequence.....................................43 Figure17：U5501 to AUX_PCM_CODEC time sequence.....................................43 Figure18：PRIM_PCM_SYNC time sequence..........................................................44 Figure19：PRIM_PCM_CODEC to U5501 time sequence...................................44 Figure20：U5501 to PRIM_PCM_CODEC time sequence...................................44 Figure21：The SPEC of C707 10M006 512 2 SIM Holder.................................47 Figure22：U5501 USIM/SIM interface reference circuit....................................48 Figure23：U5501 status indicator reference circuit............................................49 Figure24：U5501 solder antenna reference circuit.............................................51 Figure25：U5501 RF connector reference circuit.................................................51 Figure26：The view of U5501......................................................................................54 Figure27：U5501 2D mechanical dimensions .......................................................55
U5501_Hardware_User_Guide_V2.3 Page 8 of 59 1. Overview U5501 is a wireless module which is designed for the global market. It is a consumptive product; it can be designed in many kinds of applications which can work on HSDPA/UMTS/EDGE/GPRS/GSM network. On HSDPA network in the world, U5501 enables connection to the Internet at DL data speed up to 3.6Mbps. In areas where HSDPA service is not available, U5501 still enables reliable and secure data connections over UMTS at speed up to 384 Kbps or EDGE at speed up to 237Kbps or GPRS at speed up to 85.6Kbps. U5501 provides Audio, SMS, Phonebook functions as well as high speed access. It can be designed in many kinds of applications. Such as Video monitor, Tablet, Electric-book, MID, Vehicle equipment, etc. 1.1. Purpose of the document The document described the basic functions, supported services, the key features, main interfaces and reference design, the mechanics and the electronic characteristics of the module U5501. It will guide the user to design U5501 in their applications. 1.2. Summary The following lists the contents of this document.  Chapter 1: Described the overview, purpose, correlative documents, document’s history and abbreviations.  Chapter 2: Described the basic functions, key features and hardware interfaces of the module.  Chapter 3: Described in detail the module’s interfaces and reference design.  Chapter 4: Described the mechanical specifications of the module.  Chapter 5: Described in detail the power consumptions of the module.  Chapter 6: Described in detail electrical specifications of the module. 1.3. Correlative documents  U5501_SPEC  U5501_ATC
U5501_Hardware_User_Guide_V2.3 Page 9 of 59  U5501_EVB_User_Guide  U5501_Reference_Circuit  U5501_Application_Guide 1.4. Document’s history Table 1：Document’s update history Version Author Release Time Description V2.3 Huaming Zhang 2012-7-24 V2.3 create 1.5. Abbreviations Table2：Abbreviation and description Abbreviations Description AMR Adaptive Multi-rate BER Bit Error Rate BTS Base Transceiver Station PCI Peripheral Component Interconnect CS Circuit Switched (CS) domain CSD Circuit Switched Data DCE Data communication equipment DTE Data terminal equipment DTR Data Terminal Ready EDGE Enhanced Data rates for GSM Evolution EFR Enhanced Full Rate EGSM Enhanced GSM EMC Electromagnetic Compatibility ESD Electrostatic Discharge FR Frame Relay GMSK Gaussian Minimum Shift Keying GPIO General Purpose Input Output GPRS General Packet Radio Service GSM Global Standard for Mobile Communications HR Half Rate HSDPA High Speed Downlink Packet Access
U5501_Hardware_User_Guide_V2.3 Page 10 of 59 HSUPA High Speed Uplink Packet Access HSPA HSPA High-Speed Packet Access IEC International Electro-technical Commission IMEI International Mobile Equipment Identity I/O Input/Output ISO International Standards Organization ITU International Telecommunications Union bps bits per second LED Light Emitting Diode M2M Machine to machine MO Mobile Originated MT Mobile Terminated NTC Negative Temperature Coefficient PC Personal Computer PCB Printed Circuit Board PCS Personal Cellular System PCI Peripheral Component Interconnect PCM Pulse Code Modulation PCS Personal Communication System PDU Packet Data Unit PPP Point-to-point protocol PS Packet Switched QPSK Quadrate Phase Shift Keying SIM Subscriber Identity Module TCP/IP Transmission Control Protocol/ Internet Protocol UART Universal asynchronous receiver-transmitter USIM Universal Subscriber Identity Module UMTS Universal Mobile Telecommunications System USB Universal Serial Bus WCDMA Wideband Code Division Multiple Access
U5501_Hardware_User_Guide_V2.3 Page 11 of 59 2. Introduction U5501 is a wireless module which is designed for the global market. It is a consumptive product; it can be designed in many kinds of applications which can work on HSDPA/UMTS/EDGE/GPRS/GSM network. U5501 support the Bands as the following: Dual-Band UMTS（WCDMA/FDD）：900/2100 MHz； Quad-Band GSM ：850/900/DCS1800/PCS1900 MHz。 On HSDPA network in the world, U5501 enables connect to the Internet at DL data speed up to 3.6Mbps. In areas where HSDPA service is not available, U5501 still enables reliable and secure data connections over UMTS at speed up to 384 Kbps or EDGE at speed up to 237Kbps or GPRS at speed up to 85.6Kbps. U5501 provides Audio, SMS, Phonebook functions as well as high speed access. It can be designed in many kinds of applications. Such as Video monitor, Tablet, Electric-book, MID, Vehicle equipment, etc. U5501 integrates the RF and Baseband onto one small PCB. It can fulfill all the functions of RF signal receiving and transmitting, Baseband signal processing and audio signal processing so that the customers can realize all kinds of their own wireless products with very few peripheral components. Designed on a single-side PCB, U5501 has a tiny dimension of 30.0mm×30.0mm×2.5mm, with a LGA PAD interface, which provides all hardware interfaces between the module and customers’ boards. The main hardware interfaces of U5501 consist of power supply interfaces, USB interface, UART interfaces, USIM/SIM interface, Audio interfaces, PCM interface, ADC interface, VRTC interface and GPIO. U5501 is integrated with the TCP/IP protocol, it not only supports standard AT (Complied with Hayes 3GPP TS 27.007 and 27.005), but also support Longsung extended AT commands, which are very suited for developing all kinds of the customized applications. U5501 provide main interfaces for applications, the interfaces as the following: 1) Power interface 2) USB interface
U5501_Hardware_User_Guide_V2.3 Page 12 of 59 3) UART interface 4) USIM/SIM interface 5) Analog audio interface 6) PCM interface 7) GPIO 8) RESET interface 9) Power on off interface 10) Work status indicator 11) RTC interface 12) Voltage ourput 13) Antenna interface
U5501_Hardware_User_Guide_V2.3 Page 13 of 59 2.1. Key features Table3：Key features of U5501 Feature Description Power supply 3.3V～4.2V（Typical 3.8V） Frequency Bands UMTS: Dual-Band, 900/2100MHz EDGE/GPRS/GSM: Quad-Band, 850/900/1800/1900MHz HSDPA DL:3.6Mbps UMTS UMTS PS: 384 kbps(DL), 384 kbps(UL) UMTS CS: 64 kbps(DL), 64 kbps(UL) EDGE EDGE: Class12, 236.8kbps(DL), 118kbps(UL) Mobile station class B Coding schemes: MCS1-9 GPRS GPRS: Class12，85.6kbps(DL)，42.8kbps(UL) Mobile station class B Coding schemes: CS1-4 Support Full PBCCH Data CSD GSM CSD：9.6kbps Voice Triple-rate codec for HR、FR、EFR Support AMR Support DTMF Caller identification, Call forwarding, Call holding, Call waiting and Three party service SMS Point to point MO、MT SMS cell broadcast Support Text and PDU mode Temperature Normal operation: -20℃~+65℃ Restricted Operation: -30℃~+75℃ Storage temperature: -40℃~+85℃ ESD VBAT, GND: Air discharge ±8KV，Contact discharge ±4KV RF interface: Air discharge ±8KV，Contact discharge ±4KV Else ports: Air discharge ±4KV, Contact discharge±2KV Max power RF transition Class 4 (2 W) for GSM850/GSM900 Class 1 (1 W) for GSM1800/GSM1900 Class E2 (0.5 W) for EDGE900 Class E2 (0.4 W) for EDGE1800 Class 3 (0.25 W) for UMTS Current consumption Power off mode：50μA Sleep mode：<4mA Idle mode：<40mA
U5501_Hardware_User_Guide_V2.3 Page 14 of 59 Voice mode：<300mA Data mode：<600mA Application interface LGA PAD LGA PAD Power interface 1 USB2.0 High-Speed interface 1 UART interface 1 USIM/SIM interface（Compatible 3V&1.8V） 2 analog audio compatible 1 PCM interface 1 RESET interface 2 NETLIGHT ourput interface 2 voltage output(2.6V & 1.8V) 1 power on off interface 1 VRTC 12 GPIOs（2 of them voltage are 1.8V, the others are 2.6V） 2 sleep and wakeup GPIOs Antenna interface Dimensions 30.0mm×30.0mm×2. 5mm Weight <8g Fixed structure Solder with LGA PAD AT command Standard AT commands (Hayes 3GPP TS 27.007 and 27.005) Support LongSung Extend AT commands Approvals RoHS
U5501_Hardware_User_Guide_V2.3 Page 15 of 59 2.2. Operating modes Table4：Overview operating modes Mode Function Sleep mode Set WAKEUP_IN to low, the U5501 will enter to sleep mode, the module will reduce the current consumption to minimal level. GSM IDLE Software is active. Module has registered to the GSM network, and the module is ready to send and receive. GSM mode GSM TALK Connection is going on between two subscribers. In this case, the power consumption depends on network settings. GPRS IDLE Module is ready for GPRS data transfer, but no data is currently sent or received. Power consumption depends on network settings and GPRS configuration (e.g. multi-slot settings). GPRS mode GPRS DATA GPRS data transfer in progress. Power consumption depends on network settings (e.g. power control level), uplink/downlink data rates and GPRS configuration (e.g. used multi-slot settings). EDGE IDLE Module is ready for EDGE data transfer, but no data is currently sent or received. Power consumption depends on network settings and EDGE configuration (e.g. multi-slot settings). EDGE mode EDGE DATA EDGE data transfer in progress. Power consumption depends on network settings (e.g. power control level), uplink/downlink data rates and EDGE configuration (e.g. used multi-slot settings). WCDMA IDLE Software is active. Module has registered to the WCDMA network, and the module is ready to send and receive. WCDMA TALK Module is serving in audio. The power consumption depends on WCDMA network settings. WCDMA mode WCDMA DATA WCDMA data transfer in progress. Power consumption depends on network settings (e.g. power control level), uplink/downlink data rates and WCDMA configuration. Minimum Function mode VBAT remains applied. Use AT+CFUN=0 to let module go into Minimum Function mode Power Down Module will go to power off mode when:
U5501_Hardware_User_Guide_V2.3 Page 16 of 59 1. Send AT^SMSO 2. VBAT to low 3. Press the POWER_ON_OFF to power off module. 2.3. Hardware functional block diagram LGA InterfaceSW PARF Block VCTCXONAND FLASH&SDRAMRF transceiverAnalog BasebandDigital BasebandRESETUSBUSIMNetlightGPIOVBATUARTMicphone1EarphonePCM1.8VANTMicphone2SpeakerVRTC2.6VSleep and wakeup Figure1：U5501 Hardware functional block diagram ☆ RF include: 1) WCDMA Transceiver 2) GSM Transceiver 3) SW 4) VCTCXO ☆ Baseband include: 1) PMU 2) Audio process unit 3) Digital Baseband chip
U5501_Hardware_User_Guide_V2.3 Page 17 of 59 4) NAND FLASH and SDRAM
U5501_Hardware_User_Guide_V2.3 Page 18 of 59 3. Application interfaces description 3.1. 116-pin LGA PAD Figure2：U5501 116-pin LGA PAD pins sign
U5501_Hardware_User_Guide_V2.3 Page 19 of 59 Table5：U5501116-pin LGA PAD pin definition PIN NO. PIN Name I/O Describe 1 NC - - 2 NC - - 3 NC - - 4 NC - - 5 PCM_SYNC I/O PCM interface sync(2.6V) 6 PCM_DIN I PCM I/F data in(2.6V) 7 PCM_DOUT O PCM I/F data out(2.6V) 8 PCM_CLK I/O PCM interface clock(2.6V) 9 NC - - 10 NC - - 11 WAKEUP_IN I External system wakeup module(2.6V) 12 VBAT I Power supply input(3.3V~4.2V, typical 3.8V/1A 13 VBAT I Power supply input(3.3V~4.2V, typical 3.8V/1A 14 NC - - 15 GPIO_2.6V I/O 2.6V 16 NC - - 17 NC - - 18 NC - - 19 NC - - 20 NC - - 21 NC - - 22 NC - - 23 NC - - 24 NC - - 25 NC - - 26 NC - - 27 NC - - 28 GPIO_1.8V I/O 1.8V 29 GPIO_1.8V I/O 1.8V 30 NC - - 31 VCC_EXT_2.6V O 2.6V power output(20Ma) 32 VCC_EXT_1.8V O 1.8V power output(20mA) 33 NC - - 34 SIM_VCC O Power supply for SIM card(1.8V/2.85V) 35 VRTC I VRTC input(1.5V~3.25V, typical 3.0V) 36 NC - - 37 NC - - 38 MIC2_P I Positive pole of the input of audio interface 2 39 MIC2_N I Negative pole of the input of audio interface 2
U5501_Hardware_User_Guide_V2.3 Page 20 of 59 PIN NO. PIN Name I/O Describe 40 MIC1_P I Positive pole of the input of audio interface 2 41 MIC1_N I Negative pole of the input of audio interface 2 42 NC - - 43 GPIO_2.6V I/O 2.6V 44 GPIO_2.6V I/O 2.6V 45 GPIO_2.6V I/O 2.6V 46 GPIO_2.6V I/O 2.6V 47 NC - - 48 GND - - 49 GND - - 50 GND - - 51 GPIO_2.6V I/O 2.6V 52 GND - - 53 GND - - 54 GND - - 55 GPIO_2.6V I/O 2.6V 56 GND - - 57 GND - - 58 GND - - 59 GND - - 60 NC - - 61 NC - - 62 NC - - 63 NC - - 64 NC - - 65 NC - - 66 NC - - 67 NC - - 68 NC - - 69 NC - - 70 SIM_DET I/O SIM card insert or remove detect(2.6V) 71 WAKEUP_OUT O Module wakeup the external system(2.6V) 72 NC - - 73 UART_DSR O UART data set ready(2.6V) 74 UART_RTS O UART ready for receive(2.6V) 75 UART_DCT O UART data carrier detect(2.6V) 76 UART_TX O UART transmit data output(2.6V) 77 UART_RING O UART ring indicator(2.6V) 78 UART_RX I UART receive data input(2.6V) 79 UART_DTR I UART data terminal ready(2.6V)
U5501_Hardware_User_Guide_V2.3 Page 21 of 59 PIN NO. PIN Name I/O Describe 80 UART_CTS I UART clear to send(2.6V) 81 POWER_ON_OFF I System power on or power off 82 NC - - 83 NC - - 84 NC - - 85 USB_DM I/O USB 2.0 high speed D- 86 USB_DP I/O USB 2.0 high speed D+ 87 NC - - 88 SIM_RESET O SIM reset 89 SIM_DATA I/O SIM data 90 SIM_CLK O SIM clock 91 LED_STATUS O Status indicator(Drive current: 10mA) 92 NC - - 93 NC - - 94 NC - - 95 NC - - 96 EAR_OUT_N O Negative pole of the output of earphone 97 EAR_OUT_P O Positive pole of the output of earphone 98 SPKR_OUT_P O Positive pole of the output of speaker 99 SPKR_OUT_N O Negative pole of the output of speaker 100 RESET_N I Reset module(1.8V) 101 LED_MODE O Mode indicator(Drive current: 10mA) 102 NC - - 103 NC - - 104 NC - - 105 GPIO_2.6V I/O 2.6V 106 GND - - 107 MAIN_ANT - RF main antenna interface 108 GND - - 109 GPIO_2.6V I/O 2.6V 110 GND - - 111 NC - - 112 GND - - 113 GPIO_2.6V I/O 2.6V 114 GND - - 115 NC - - 116 GND - -
U5501_Hardware_User_Guide_V2.3 Page 22 of 59 3.2. Power supply U5501 power on and power off correlative interfaces as the following: Table6：U5501 Power supply correlative interfaces PIN Name I/O PIN No. 描述 VBAT I 12,13 Power supply ，3.3V~4.2V ，typical 3.8V VRTC I 35 1.5~3.25，typical 3.0V VCC_EXT_1.8V O 32 Voltage output，1.8V，20mA VCC_EXT_2.6V O 31 Voltage output，2.6V，20mA POWER_ON_OFF I 81 Power on off control, low active RESET I 100 Reset，1.8V，low active GND 48~50,52~59,106,108, 110,112,114,116 GND 3.2.1. Power Supply and reference design 3.2.1.1. VBAT input The power supply of U5501 should be a single voltage source with VBAT ranged from 3.3V to 4.2V. As a mobile terminal conformed to the HSDPA/UTMS/GSM criterions, in some case, the ripple in a transmit burst may cause a maximum voltage drop of 450mV while the current consumption will rise to the typical peak of 2A. So the power supply must be able to provide sufficient current. The capacitor must be a larger one electrolytic capacity (recommend 2200uF/10V) or two smaller dimension tantalum capacities (470uF/6.3V) in parallel (CA) is recommended. And with a small (0.1 µF to 1µF) ceramic (CB) in parallel; the capacitors should put as close as possible to the U5501 VBAT pins.
U5501_Hardware_User_Guide_V2.3 Page 23 of 59 VBATCACB+ Figure3：U5501 Power supply VBAT input 3.2.1.2. VRTC input The PIN35 is VRTC interface. VRTC can be used for connecting backup rechargeable battery. When VBAT power supply is not available, the battery supplies the power to RTC core of U5501. When VBAT is available, U5501 can recharge the battery via VRTC pin. If the RTC is useless for you, you can set PIN51 as NC. Reference design as the following: Figure4：VRTC connect to rechargeable battery If use non-rechargeable battery, the reference design as the following:
U5501_Hardware_User_Guide_V2.3 Page 24 of 59 VRTCModuleNon-rechargeable batteryRTC Core Figure5：VRTC connect to non-rechargeable battery If use a large capacitance capacity, the reference design as the following: Figure6：VRTC connect to large capacitance capacity 3.2.1.3. VOUT voltage output During U5501 working, 2.6V voltage will output through PIN31 and 1.8V voltage will output through PIN32, which named VCC_EXT_2.6V and VCC_EXT_1.8V. The current is rated for 20mA. They can be used as a power supply of the external device, such as LCD. And you can read the level of VCC_EXT_2.6V to judge whether the module is working. 3.2.1.4. POWER_ON_OFF input The POWER_ON_OFF (PIN81) is used to control U5501 power on and power off.  When module is power off, pull down POWER_ON_OFF for at least 0.5s, the module is powered on;  When module is power on, pull down POWER_ON_OFF for at least 2.5s again, the module is powered off.
U5501_Hardware_User_Guide_V2.3 Page 25 of 59 The reference circuit is shown as follow， the AP_PWR_CTRL is the control signal from the application side. Module81AP_PWR_CTRLPOWER_ON_OFFTon Figure7：POWER_ON_OFF reference circuit 3.2.1.5. RESET_N input The RESET (PIN100) can control U5501 module to reset. The RESET is active by low level.  A low level pulse with 100mS will be used when set module reset. The part of RESET reference design as the Figure11. AP_RESET is the control signal from the application. Figure8：RESET control module reset
U5501_Hardware_User_Guide_V2.3 Page 26 of 59 3.2.2. Power on/off time sequence 3.2.2.1. Power on time sequence Insure that the power supply of U5501 VBAT is active (3.3V~4.2V, typical 3.8V).The POWER_ON_OFF must be controlled. Figure9：power on time sequence 3.2.2.2. Normal power off time seqence U5501 support press POWER_ON_OFF and send AT command to power on.  When module is power on, pull down POWER_ON_OFF for at least 2.5s, the module is powered off;  When module is power on, send AT^SMSO, the module is powered off. Power off time sequence is as follow:
U5501_Hardware_User_Guide_V2.3 Page 27 of 59 Figure10：U5501 power off time sequence 3.2.2.3. Low power to power off When the power supply of U5501 VBAT is below 3.3V (include VBAT is off), the module will be power off. Note: In this case, the module don`t logout from the BS. 3.2.3. Reset time sequence Control RESET_N (RESET) to set U5501 reset. The RESET_N is active by low level. The RESET_N signal must be a Tst (100mS) low pulse. Send AT+RESET can reset the U5501 too. Figure11：U5501 RESET time sequence
U5501_Hardware_User_Guide_V2.3 Page 28 of 59 3.3. USB interface 3.3.1. USB interface description U5501 module supports a USB2.0 High-Speed interface. U5501 default PID is 0X9603. When the USB drivers of U5501 are installed, the OS will detect 3 virtual serial ports: Modem port, Diagnostic port and AT port. Table7：U5501 USB interface PIN Name I/O PIN No. 描述 USB_DM I/O 85 USB data- USB_DP I/O 86 USB data+ GND 48~50,52~59,106,108, 110,112,114,116 GND 3.3.2. USB reference circuit The USB part reference design circuit is as follow Module65USBBFESDESD Figure12：U5501 USB reference circuit
U5501_Hardware_User_Guide_V2.3 Page 29 of 59 1) To get the reliable USB power supply, it is recommended to use a 10uF (C1) filter capacitor and a 33pF (C2) filter capacitor. DC rated voltage of the capacitors should be above 10V; 2) To reduce the reflection caused by the high frequency alternating signal in the transmission, it is recommended to add a resistor with value below 10Ω to the DM and DP in USB interface to ensure correct transmission for USB data. Just like the resistors R1 and R2; 3) To avoid static electricity in USB interface, it is recommended to use the ESD protection device. Junction capacitance of the ESD component should be less than 5pF; 4) To get the reliable USB data transfer, need protect the USB device. Such as must protect the USB_DP, USB_DM, need 90Ω impedance control, and let them keep away from the interference signal. 3.3.3. USB driver U5501 module support many kinds of OS, such as: Windows 2000, Windows XP, Windows Vista32/64, Windows 7, Windows CE5.0/6.0, Windows Mobile5.0/6.0. When use these systems, need special drivers for U5501. For different OS and VID and PID, the drivers are different. If need them, please contact with FAE of LongSung. The default VID and PID is: VID_1C9E & PID_9603. For Linux OS, such as Radhat, Ubuntu and Android, need the OS itself USB driver usbserial.ko. You need load the driver usbserial.ko and PID, VID to the system.
U5501_Hardware_User_Guide_V2.3 Page 30 of 59 3.3.3.1. Linux OS load USB driver for U5501 Make sure there is usbserial.ko driver in your Linux system. Linux2.4.X and Linux2.6.X OS have usbserial.ko, but for some Ubuntu editions must recompile the kernel to get the usbserial.ko. The following is in PC Linux2.6.X OS load driver process. (Note: Embed Linux OS may have some difference) 1) Please insert U5501 to the AP with Linux system by USB. And make sure the power supply for U5501 is active and steady and can power on U5501; 2) Preparation of lookup USB devices by Linux usbfs filesystem, mount the USB filesystem, type the command like this: #mount -t usbfs none /proc/bus/usb 3) Check the status of AP device, in order to make sure AP is ready, we can type command like this: #cat /proc/bus/usb/devices Then we will get the result as the following: T: Bus=03 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=9 Spd=12 MxCh= 0 D: Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1 P: Vendor=1c9e ProdID=9603 Rev= 0.00 S: Manufacturer=Qualcomm, Incorporated S: Product=Qualcomm CDMA Technologies MSM C:* #Ifs= 5 Cfg#= 1 Atr=a0 MxPwr=500mA I:* If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none) E: Ad=81(I) Atr=03(Int.) MxPS= 16 Ivl=128ms E: Ad=82(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms E: Ad=02(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms I:* If#= 1 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
U5501_Hardware_User_Guide_V2.3 Page 31 of 59 E: Ad=84(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms E: Ad=04(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms I:* If#= 2 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none) E: Ad=86(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms E: Ad=06(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms If the USB device is ready, we can see the red characters listed above. From it, the vendor ID and product ID is 1c9e and 9603. Like Vendor=1c9e ProdID=9603 Rev= 0.00. Also, we can see three serial ports displayed by blue characters. They are diagnostic port, AT port and modem port (The ports from the top to the bottom should be like this: DIAG, AT, MODEM). 4) Install USB drivers in AP, type command like this: ＃modprobe usbserial vendor=0x1c9e product=0x9603 5) Check the status of device driver, type command like this: #cat /proc/bus/usb/devices You my get the result as the following: T: Bus=03 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=3 Spd=12 MxCh= 0 D: Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=1 P: Vendor=1c9e ProdID=9603 Rev= 0.00 S: Manufacturer=Qualcomm, Incorporated S: Product=Qualcomm CDMA Technologies MSM C:* #Ifs= 5 Cfg#= 1 Atr=a0 MxPwr=500mA I:* If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=usbserial_generic E: Ad=81(I) Atr=03(Int.) MxPS= 16 Ivl=128ms E: Ad=82(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms E: Ad=02(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms I:* If#= 1 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=usbserial_generic E: Ad=84(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms
U5501_Hardware_User_Guide_V2.3 Page 32 of 59 E: Ad=04(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms I:* If#= 2 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=usbserial_generic E: Ad=86(I) Atr=02(Bulk) MxPS= 64 Ivl=0ms E: Ad=06(O) Atr=02(Bulk) MxPS= 64 Ivl=0ms If the driver is ready, we can see the usbserial_generic on the right side of each port. 6) Check the device point in the /dev filesystem: #cd /dev # ls ttyUSB* If the AP driver is OK, there should be ttyUSB0~ ttyUSB2. 3.3.3.2. Linux OS AP use AT to control U5501 1) Please insert the USIM/SIM card into the application terminal, make sure the USIM/SIM card with Data service already been permitted. Plug the WCDMA/GSM antenna to RF connector of U5501. Power on the module U5501, load the USB driver, create USB end ports: ttyUSB0~ ttyUSB2. 2) Run minicom application in Linux OS: #minicom –s In the menu of minicom select “Serial port setup”, set “Serial device ” as /dev/ttyUSB1 (Note: AT(ttyUSB1), Modem(ttyUSB2) can response AT commands, Diag (ttyUSB0) can not response AT commands); Then back to the menu of minicom and select “Save setup as df1 ”, save the configuration, then select “exit ” to exit minicom. 3) Send AT commands by minicom #minicom It should prompt as the following: Welcome to minicom 2.3 OPTIONS: I18n Compiled on Feb 24 2008, 16:35:15. Port /dev/ttyUSB1
U5501_Hardware_User_Guide_V2.3 Page 33 of 59 Press CTRL-A Z for help on special keys Input AT command to open the echo of AT: ATE IF the system is running normally, it should prompt as the following: OK Input AT command to get the version of firmware: AT+LCTSW Will get the following response: SoftwareVersion: LQA0082.2.3_MG24 InnerVersion: LQA0082_240085_6.0.8W1215_EFS1.5 OK Input AT command to get the strength and BER: AT+CSQ Will get the following response: +CSQ: 20,74 OK Input AT command to get the status of registration: AT+CREG? Will get the following response: +CREG: 0,1 OK Input AT command to get the information operator: AT+COPS? Will get the following response: +COPS: 0,0,"CHN-CUGSM",2
U5501_Hardware_User_Guide_V2.3 Page 34 of 59 OK 3.3.3.3. Linux OS AP dial PPP connection 1) Repeat loading USB driver and AT communication with U5501. Make sure U5501 get the normal registration, and the strength of RF signal will be stronger than 13 (The first parameter of CSQ). 2) Make sure the Linux OS has pppd application, if it hasn’t pppd application, please install kppp, you will get pppd in your OS. 3) Create a new file: /etc/ppp/chat/gprs-connect-chat Then add messages as the following: TIMEOUT 15 ABORT "DELAYED" ABORT "BUSY" ABORT "ERROR" ABORT "NO DIALTONE" ABORT "NO CARRIER" TIMEOUT 40 '' \rAT OK ATS0=0 OK ATE0V1 OK AT+CGDCONT=1,"IP","3GNET" OK ATDT*99***1# CONNECT '' Note: Different USIM/SIM card which you insert in the application terminal, AT+CGDCONT=1,"IP","3GNET" will be different. Please contact the operator to get the APN and replace the parameter "3GNET".
U5501_Hardware_User_Guide_V2.3 Page 35 of 59 4) Modify the configuration of pppd: /etc/ppp/options If you find the “auth”, modify it as “#auth”. The result is there aren’t ID verification. 5) Create a new file: /etc/ppp/peer/gprs Add messages as the following: (The end port must be ttyUSB2): # Usage: root>pppd call gprs /dev/ttyUSB2 9600 crtscts modem #noauth debug nodetach #hide-password usepeerdns noipdefault defaultroute user "3gnet" 0.0.0.0:0.0.0.0 ipcp-accept-local ipcp-accept-remote #lcp-echo-failure 12 #lcp-echo-interval 3 #noccp #novj #novjccomp #persist connect '/usr/sbin/chat -s -v -f /etc/ppp/chat/gprs-connect-chat'
U5501_Hardware_User_Guide_V2.3 Page 36 of 59 6) Connect to the Internet: #pppd call gprs # ifconfig If you get the ppp0 net port means that PPP is successful. eth0 Link encap:Ethernet HWaddr 00:1D:09:33:A7:E1 inet addr:172.16.180.105 Bcast:172.16.180.255 Mask:255.255.255.0 inet6 addr: fe80::21d:9ff:fe33:a7e1/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:39793 errors:0 dropped:0 overruns:0 frame:0 TX packets:17971 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:3445057 (3.2 MiB) TX bytes:20088925 (19.1 MiB) Interrupt:169 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:20 errors:0 dropped:0 overruns:0 frame:0 TX packets:20 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:1160 (1.1 KiB) TX bytes:1160 (1.1 KiB) ppp0 Link encap:Point-to-Point Protocol inet addr:10.182.207.113 P-t-P:10.64.64.64 Mask:255.255.255.255 UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1 RX packets:5 errors:0 dropped:0 overruns:0 frame:0 TX packets:6 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:3 RX bytes:62 (62.0 b) TX bytes:101 (101.0 b) 7) Testing the Internet # ping 119.75.217.56 It is the IP address of www.baidu.com. If the ping fails, we need add a route like this: #route add default gw 10.64.64.64 Note: 10.64.64.64 is the ISP address as the red character above. # ping www.baidu.com If ping www.baidu.com fails, we should add DNS to the /etc/resolv.conf
U5501_Hardware_User_Guide_V2.3 Page 37 of 59 8) Disconnect the internet # killall pppd 3.4. UART interface U5501 module provides a UART interface. Which can be used for AT interactive and data transfer. 3.4.1. UART interface description Table8：U5501 UART 接口 PIN Name I/O PIN No. 描述 UART_DSR O 73 UART data set ready(2.6V) UART_RTS O 74 UART ready for receive(2.6V) UART_DCT O 75 UART data carrier detect(2.6V) UART_TX O 76 UART transmit data output(2.6V) UART_RING O 77 UART ring indicator(2.6V) UART_RX I 78 UART receive data input(2.6V) UART_DTR I 79 UART data terminal ready(2.6V) UART_CTS I 80 UART clear to send(2.6V) GND 48~50,52~59,106,108, 110,112,114,116 地 3.4.2. UART interface reference circuit For an application system, U5501 uses as DCE (Data Communication Equipment) and application terminal uses as DTE (Data terminal equipment). The reference circuit is as follow:
U5501_Hardware_User_Guide_V2.3 Page 38 of 59 Figure13：U5501 UART connection 3.4.3. UART interface description 1) Full-duplex; 2) 7-bit or 8-bit data; 3) 1-bit or 2-bit stop bit; 4) Odd parity check, even parity check or non-check; 5) Direct memory access(DMA) transmission; 6) Baud rate ranging from 600bps to 230400bps(115200bps by default); 7) Self-adapted baud rate ranging from 1200bps to 115200bps. 3.5. U5501 sleep and wakeup control In order to describe easily, it is named U5501 as BP and the MCU of application terminal as AP. Sleep and wakeup interface is described in the table as follow: Table9：U5501 sleep and wakeup interface PIN Name I/O PIN No. 描述 WAKEUP_IN I 11 H: DTE wakeup U5501; L: DTE set U5501 to sleep mode. WAKEUP_OUT O 71 H: Module is in wakeup mode and module serial/USB is available; L: Module is in sleep mode and serial/USB is not available. GND 48~50,52~59,106,108, GND
U5501_Hardware_User_Guide_V2.3 Page 39 of 59 110,112,114,116 3.6. Analog audio interface U5501 provide 2 channels analog audio interface. 3.6.1. Analog audio interface description The audio signals are shown in as follow: Table10 ：U5501 analog audio interface description PIN Name I/O PIN No. 描述 MIC2_P I 38 Positive pole of the input of audio interface 2 MIC2_N I 39 Negative pole of the input of audio interface 2 MIC1_P I 40 Positive pole of the input of audio interface 2 MIC1_N I 41 Negative pole of the input of audio interface 2 EAR_OUT_N O 96 Negative pole of the output of earphone EAR_OUT_P O 97 Positive pole of the output of earphone SPKR_OUT_P O 98 Positive pole of the output of speaker SPKR_OUT_N O 99 Negative pole of the output of speaker 3.6.2. Hands-free channel The second audio channel can be used for the hands-free without requiring any audio amplifier. The output pins are configured differently, with a rated output of 500mW into an 8 Ω speaker. Considerable current flows between the audio output pins and the speaker, and thus wide PCB traces are recommended 20 mils. Table11 ：U5501 second channel audio PIN Name PIN No. Hands-free Description SPKR_OUT_P 98 SPK_P Loudspeaker output differential signal + SPKR_OUT_N 99 SPK_N Loudspeaker output differential signal - MIC2_P 38 MIC_P Audio input channel 2 differential signal + MIC2_N 39 MIC_N Audio input channel 2 differential signal - 3.6.3. Handset channel The first audio channel can be used for the handset without requiring any audio amplifier. The output power for the differential ear output is typically 350 mW
U5501_Hardware_User_Guide_V2.3 Page 40 of 59 for a full-scale +3 dBm sine wave into a 32-ohm speaker. Table12 ：U5501 first channel audio PIN Name PIN No. Handset Description EAR_OUT_N 96 EAR_N Audio output channel 1 differential signal - EAR_OUT_P 97 EAR_P Audio output channel 1 differential signal + MIC1_P 40 MIC_P Audio input channel 1 differential signal + MIC1_N 41 MIC_N Audio input channel 1 differential signal - 3.6.4. Analog audio reference circuit The U5501 analog audio reference circuit is shown as follow: 10pF 33pFESD10pF 33pF10pF 33pF ESDDifferential LayoutClose to Speaker10pF 33pFESD10pF 33pF10pF 33pF ESDDifferential LayoutClose to MICMIC1_P/MIC2_PMIC1_N/MIC2_NEAR_P/SPK_PEAR_N/SPK_NModuleBEADBEAD1nF1nF Figure14：U5501 analog audio reference circuit 1) The audio output signals, a pair of differential signals, output to two speakers. The output signals are not real stereo signals which are different
U5501_Hardware_User_Guide_V2.3 Page 41 of 59 from traditional stereo sound. 2) It is recommended to use the filter capacitor or filter circuit to reduce inter frequency interference and improve audio quality. Just like what is shown in the figure above. 3) To avoid static electricity, it is recommended to use the ESD protection device. 4) It requires connecting audio analog signal ground with the general digital circuit ground, magnetic bead or zero ohm resistance can be used. 5) IF use an audio amplifier for speaker, optional EMI filtering is shown at Fogure14, these components (two ferrite beads and two capacitors) can be added to reduce electromagnetic interference. If used, they should be located near the EAR_P and EAR_N. 6) Considerable current between the audio output pins and the speaker, the width of PCB traces are recommended 20mils. 3.7. PCM interface U5501 module provides a PCM interface. The PCM include 4 pin digital signals. Use PCM interface can support communication between U5501 and external CODEC. PCM TX data will be routed from the external codec MIC through the DSP encode path in the U5501 module. PCM RX data will be routed through the DSP decode path to the external codec speaker. The base band of U5501 can be used in two modes: 1) Auxiliary PCM, the auxiliary PCM that runs at 128 kHz and uses a 62.5 μs sync pulse (half a time frame). 2) Primary PCM, the primary PCM that runs at 2.048 MHz and uses 488 ns sync pulse (one 2.048 MHz clock tick). Table13 ：Auxiliary PCM and Primary PCM configuration Configuration SYNC CLK Clock source Format Auxiliary 8KHz 128KHz Master 8Bits μ-law,
U5501_Hardware_User_Guide_V2.3 Page 42 of 59 Primary 8KHz 2.048MHz Master/Slave 8Bits A-law, 16Bits Linear (13 bits are valid, the others are blank) The default configuration of U5501 is Primary PCM, and can use AT command to select Master Mode or Slave Mode. In Slave mode, the external codec drives the clock and sync signals that are sent to the U5501 module. U5501 module supports 3 PCM formats: 8Bits μ-law, 8Bits A-law, 16Bits (Linear). 3.7.1. PCM interface description Table14 ：U5501 PCM interface PIN Name I/O PIN No. Description PCM_SYNC O 5 PCM Synchronous Signal PCM_CLK I 8 PCM CLK PCM_DIN I 6 PCM Input PCM_DOUT O 7 PCM Output 3.7.2. Auxiliary PCM The Auxiliary PCM interface enables communication with an external codec to support hands-free applications. The auxiliary codec port operates with standard long-sync time sequence and a 128 kHz clock. The AUX_PCM_SYNC runs at 8 kHz with a 50% duty cycle. Most μ-law and A-law codecs support the 128 kHz AUX_PCM_CLK bit clock. Figure15：AUX_PCM_SYNC time sequence
U5501_Hardware_User_Guide_V2.3 Page 43 of 59 Figure16：AUX_PCM_CODEC to U5501 time sequence Figure17：U5501 to AUX_PCM_CODEC time sequence Table15 ：AUX_CODEC time sequence parameters
U5501_Hardware_User_Guide_V2.3 Page 44 of 59 3.7.3. Primary PCM U5501 module firmware default configuration is Primary PCM. PRIM_PCM_CLK is 2.048 MHz clock, PRIM_PCM_SYNC is 8 kHz (488nS), and μ-law PCM format. Figure18：PRIM_PCM_SYNC time sequence Figure19：PRIM_PCM_CODEC to U5501 time sequence Figure20：U5501 to PRIM_PCM_CODEC time sequence
U5501_Hardware_User_Guide_V2.3 Page 45 of 59 Table16 ：PRIM_CODEC time sequence parameters 3.8. USIM/SIM interface U5501 module supports HSPA/UTMS mode USIM card and GSM/GPRS/EDGE mode SIM card. 3.8.1. USIM/SIM interface description U5501 module supports 1.8/3.0V USIM/SIM card. Table17 ：U5501 USIM/SIM 接口 PIN Name I/O PIN No. Description SIM_DATA I/O 89 USIM/SIM DATA SIM_CLK O 90 Clock Signal SIM_RESET O 88 RESET Signal SIM_VCC O 34 USIM/SIM Power
U5501_Hardware_User_Guide_V2.3 Page 46 of 59 SIM_DET I 70 USIM/SIM detect GND 48~50,52~59,106,108, 110,112,114,116 地 3.8.2. USIM/SIM interface reference circuit For 6-pin USIM/SIM card, we recommend to use the Amphenol C707 10M006 512 2 SIM Holder. For more information, you can visit the Amphenlo company web: http://www.amphenol.com/ The SPEC of C707 10M006 512 2 SIM Holder is as follow.
U5501_Hardware_User_Guide_V2.3 Page 47 of 59 Figure21：The SPEC of C707 10M006 512 2 SIM Holder USIM/SIM interface reference design circuit as follow.
U5501_Hardware_User_Guide_V2.3 Page 48 of 59 Module2222SIM_VCCSIM_RESETSIM_CLKSIM_DATA33pF100nFVCCRSTCLKGNDVPPIO1236542215K33pFESDESDESDESDSIM_DETDET 710K3.3V Figure22：U5501 USIM/SIM interface reference circuit 1) The USIM_DATA line of USIM is connected to USIM_VCC by a pull-up resistor with reference value 10KΩ; 2) To avoid the instantaneous voltage overflowing, the resistor with reference value 22Ω can be used for the USIM_DATA, USIM_CLK and USIM_RESET line; 3) To avoid the static electricity in USIM socket, it is recommended to use the ESD protection device for the USIM_DATA, USIM_CLK and USIM_VCC line; 4) To get more flat USIM power supply, it is recommended to use the filter capacitors, and reference value 33pF and 100nF; 5) To eliminate the peak interference and high frequency interference signal on USIM_RESET line, the filter capacities can be placed in USIM_RESET line, the reference value is 33pF; 6) SIM_DET is the USIM/SIM insert or remove detector. 3.9. Status indicator interface The U5501 provide 2 status indicators, which are PIN91 and PIN101. 3.9.1. Status indicator description The U5501 status indicator is decribed as follow.
U5501_Hardware_User_Guide_V2.3 Page 49 of 59 Table18 ：U5501 status indicator description PIN Name I/O PIN No. Description LED_STATUS O 91 Status indicator LED_MODE O 101 Status indicator Status indicator is described as follow. Table19 ：U5501 status indicator description Status LED_STATUS LED_MODE 1 Registered in 3G network The indicator blinks once each time(100ms On/2900ms Off) Light off 2 3G network data transferring Light on Light off 3 Download firmware Light off The indicator blinks fast (100ms On/100ms Off) 4 Searching network Light off The indicator blinks twice each time（100ms On/100ms Off/100ms On/2700ms Off） 5 Registered in 2G network Light off The indicator blinks once each time (100ms On/2900ms Off) 6 2G network data transferring Light off Light on 3.9.2. Status indicator reference circuit The status indicator reference circuit is shown as follow: Figure23：U5501 status indicator reference circuit IF *R+VF = VBAT VF: LED Forward Voltage
U5501_Hardware_User_Guide_V2.3 Page 50 of 59 IF: LED Forward current 3.10. GPIO U5501 provide several GPIOs. Table20 ：U5501 GPIOs PIN Name I/O PIN NO. Description GPIO_2.6V I/O 15 2.6V voltage level GPIO_1.8V I/O 28 1.8V voltage level GPIO_1.8V I/O 29 1.8V voltage level GPIO_2.6V I/O 43 2.6V voltage level GPIO_2.6V I/O 44 2.6V voltage level GPIO_2.6V I/O 45 2.6V voltage level GPIO_2.6V I/O 46 2.6V voltage level GPIO_2.6V I/O 51 2.6V voltage level GPIO_2.6V I/O 55 2.6V voltage level GPIO_2.6V I/O 105 2.6V voltage level GPIO_2.6V I/O 109 2.6V voltage level GPIO_2.6V I/O 113 2.6V voltage level 3.11. Antenna interface PIN107 is the antenna pad. Table21 ：U5501 antenna interface PIN Name I/O PIN No. Description ANT 107 Antenna GND 48~50,52~59,106,108, 110,112,114,116 GND There are two types antenna reference design with the U5501, one is the solder antenna, the other is use the antenna connector. We recommend to layout with microstrip line in both of the two types. 3.11.1. Solder antenna The reference circuit of solder antenna is shown as follow:
U5501_Hardware_User_Guide_V2.3 Page 51 of 59 ModuleGNDGNDANTGND27pFGNDL1C2NAC10RC3NA2.0×2.0mm3.0×3.0mmTP1TP2Close to TP1 Figure24：U5501 solder antenna reference circuit The matters need attention about the U5501 solder antenna are as follow: 1) PI type matching filter(L1, C2, C3) must close to the TP1, and separate the GND pad(TP2) from the TP1 0.7mm at least; 2) Control the microstrip line impedance to 50ohm; 3) Keepout: We recommend the trace width 1.2mm in top layer, and separate the other trace from 1.2mm, there need not keepout in bottom layer. 3.11.2. RF connector The reference circuit of the U5501 use the RF connector is as follow: Figure25：U5501 RF connector reference circuit We recommend the antenna connector(J1) type is MM9329-2700RA1 which provided by MURATA. The matters need attention of the U5501 antenna connector are as follow:
U5501_Hardware_User_Guide_V2.3 Page 52 of 59 1) PI type matching filter(L1, C2, C3) must close to the TP1, and separate the GND pad(TP2) from the TP1 0.7mm at least; 2) Control the microstrip line impedance to 50ohm; 3) Keepout: We recommend the trace width 1.2mm in top layer, and separate the other trace from 1.2mm, there need not keepout in bottom layer. 3.11.2.1. RF cable When you use RF Connector, please select the RF cable carefully; it is required to use RF cable of which the insertion loss should comply with: z GSM900/GSM850<1dB z DCS1800/PCS1900<1.5dB z WCDMA2100<1.5dB z WCDMA900<1dB We recommend use the MXTK88TK200 which provided by MURATA. 3.11.3. U5501 RF output power The RF output power of U5501 is shown as follow: Table22 ：U5501 RF output power Band Max Min GSM850 33dBm ± 1dB 5dBm ± 5dB E-GSM900 33dBm ± 1dB 5dBm ± 5dB DCS1800 29dBm ± 1dB 0dBm ± 5dB PCS1900 29dBm ± 1dB 0dBm ± 5dB WCDMA2100 24dBm +1/-3dB -56dBm ± 9dB WCDMA900 24dBm +1/-3dB -56dBm ± 9dB 3.11.4. U5501 RF receiver sensitivity Table23 ：U5501 RF receiver sensitivity Band Receive sensitivity GSM850 <-106dBm E-GSM900 <-106dBm DCS1800 <-106dBm PCS1900 <-106dBm WCDMA2100 <-108dBm
U5501_Hardware_User_Guide_V2.3 Page 53 of 59 Band Receive sensitivity WCDMA900 <-106dBm 3.11.5. U5501 operating frequencies Table24 ：U5501 operating frequencies Band Receive Transmit GSM850 869~894MHz 824~849MHz E-GSM900 925~960MHz 880~915MHz DCS1800 1805~1880MHz 1710~1785MHz PCS1900 1930~1990MHz 1850~1910MHz WCDMA2100 2110~2170MHz 1920~1980MHz WCDMA900 880~915MHz 925~960MHz 3.11.6. Antenna parameters requirement Table25 ：U5501 antenna parameters requirement Gain Band VSWR Peak Avg. Efficiency SAR TRP (dBm) TIS (dBm) GSM850 28 <-102 EGSM900 28 <-102 DCS1800 25 <-102 PCS1900 25 <-102 WCDMA900 18 <-102 WCDMA2100 <2.5:1 >0dBi >-4dBi >40% <1.6 W/Kg 18 <-104
U5501_Hardware_User_Guide_V2.3 Page 54 of 59 4. Mechanics 4.1. The view of U5501 Figure26：The view of U5501 4.2. 3D stack If you need the 3D stack of U5501, please contact us to obtain it.
U5501_Hardware_User_Guide_V2.3 Page 55 of 59 4.3. 2D mechanical dimensions Figure27：U5501 2D mechanical dimensions 4.4. Application side library of U5501 The library which includes schematic decal and PCB decal. Please contact us to obtain them.
U5501_Hardware_User_Guide_V2.3 Page 56 of 59 5. Power consumption U5501 current consumption (VBAT Power supply: DC3.8V) is shown as follow. Table26 ：U5501 max current consumption in some mode Sleep 模式状态下耗流 工作频段 配置 平均值(mA） 2 3.2 5 2.1 GSM850 9 1.5 2 3.1 5 1.9 GSM900 9 1.5 2 3.1 5 1.8 DCS1800 9 1.5 2 2.9 5 2 PCS1900 9 1.4 6 3.9 7 2.4 W2100 9 0.8 6 3.9 7 2.7 W900 9 0.8
U5501_Hardware_User_Guide_V2.3 Page 57 of 59 6. Electrical characteristics 6.1. Absolute maximum power ratings Absolute maximum power ratings for power supply and the voltage on digital and analog pins of U5501 module are listed as follow. Out of the range, the module should be damaged. Table27 ：Absolute maximum power ratings Parameter Description Min Typ Max Unit U5501 power supply -0.5 3.8 4.2 V RMS average current 0 0.9 A VBAT Voltage drop during transmit burst, IVBAT peak current may up to 2A (Per 4.6ms) 400 mV Digital IO voltage -0.3 2.6 3.0 V GPIO Voltage in power off mode -0.25 0.25 V 6.2. Operating temperatures U5501 module can normal operate in the environment temperature in -20~+65℃. If you will use it in the environment which out of the range, we recommend customer has some method to control the temperature around U5501 module. In the restricted operation temperature, some RF parameter may out of the 3GPP RF standard. The module can work, such as voice, SMS, data. In the storage temperature, the module may be not able to work, just for storage. The temperature out of the range, the U5501 module should be damaged. Table28 ：U5501 module operating temperature Temperature Min Typ Max Unit Normal operation temperature -20 25 65 ℃
U5501_Hardware_User_Guide_V2.3 Page 58 of 59 Restricted operation temperature -30 ~ -20 65 ~ 75 ℃ Storage temperature -40 85 ℃ 6.3. Interface operating status VL：logistic low level; VH：logistic high level. Table29 ：Digital Signal DC Characteristics VL VH Signal Min Max Min Max Unit Input -0.3 0.3*Vpin_min 0.3*Vpin_max Vpin_max V Output GND 0.2 Vpin_min-0.2 Vpin V Note：Vpin_min=2.25V, Vpin_max=3.0V (Vpin is the digital interface high level，Vpin=2.6V) Table30 ：U5501 power supply range Parameter I/O Min Typ Max Unit VBAT I 3.3 3.8 4.2 V SIM_VCC O 1.7/2.75 1.8/2.85 1.9/2.95 V 6.4. Reliability Table31 ：Requirements on the environment reliability Test case Test requirement Low temperature Storage test -40 ±3℃℃, power off mode storage 24 hours High temperature Storage test +85 ±3℃℃, power off mode storage 24 hours Tem pe ra tur e change test In power off mode, between -40℃ and +85℃, stay 0.5h, change time <3min, total 24 times High temperature high humidity test Tem pe ra tur e: + 85 ±3℃℃ Humidity: 90~95%RH Power off mode storage 24 hours Low temperature operating -20 ±3℃℃, keep operating for 24 hours High temperature +65 ±3℃℃, keep operating for 24 hours
U5501_Hardware_User_Guide_V2.3 Page 59 of 59 Test case Test requirement operating Vibration test Vibration test requirement: Frequency Random Vibration ASD 5~20Hz 0.96m2/s3 20~500Hz 0.96m2/s3(20Hz), else -3dB/times frequency Connector Life Test Board-to-board connector plug 50 times; RF connector plug 30 times ESD test 1, When module in voice mode, discharge antenna port, VBAT PAD and GND, ESD must meet the following targets: 1) Contact discharge pass: ±2KV、±4KV test class 2) Air discharge pass: ±2KV、±4KV、±8KV test class 2, When module in voice mode, discharge SIM card hold of EVB, ESD must meet the following targets: 1) Contact discharge pass: ±2KV test class 2) Air discharge pass: ±2KV、±4KV test class 6.5. Electrostatic discharge U5501 module is a consumptive product. Although the module has some ESD protect function, we recommend in application need more ESD protect means to avoid the static electricity from the application environment, please reference to the interface reference design circuit. In order to improve the antistatic performance of the system, we recommend customer is advised of the following main board: layout an exposed copper under the module U5501, U5501 shield frame solder feet welded to the customer board. The solder feet, copper, solder feet and GND are connected. The ESD capacity of U5501 is listed as follow. Table32 ：The ESD endure status measured table (Temperature: 25℃, Humidity: 45%) Part Air discharge Contact discharge VBAT,GND ±8KV ±4KV Antenna port ±8KV ±4KV Other port ±4KV ±2KV

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