Simcom 2011091310088 GSM/GPRS/GPS Module User Manual SIM908 Rev 3

Shanghai Simcom Ltd. GSM/GPRS/GPS Module SIM908 Rev 3

Users Manual

SIM908 Document - 1 - SIM908 User Manual Note: This device complies with part 15 Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. If this equipment is installed in a host, We can find the ID label when opening the host. For label requirement when transmitter module is installed in a host, the host shall have an additional permanent label referring to the enclosed module:“Contains Transmitter Module FCC ID: UDV-2011091310088” or “Contains FCC ID: UDV-2011091310088”. This equipment has a GSM antenna and a GPS antenna, the GPS antenna peak gain is 5 dBi and modulation type is BPSK; the GSM antenna peak gain is 3 dBi and modulation type is GMSK. WARNING: Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. The antenna of the product, under normal use condition is at least 24.22 cm away from the body of the user,the user must keeping at least 24.22cm distance to the antenna. The device has been evaluated to meet general RF exposure requirement. The device can be used in portable exposure condition without restriction. 1. SIM908 Description 1.1 Summarize Designed for global market, SIM908 is integrated with a high performance GSM/GPRS engine and a GPS engine. The GSM/GPRS engine is a quad-band GSM/GPRS module that works on frequencies GSM 850MHz, EGSM 900MHz, DCS 1800MHz and PCS 1900MHz. SIM908 features GPRS multi-slot class 10/ class 8 (optional) and supports the GPRS coding schemes CS-1, CS-2, CS-3 and CS-4. The GPS solution offers best- in-class acquisition and tracing sensitivity, Time-To-First-Fix (TTFF) and accuracy. With a tiny configuration of 30*30*3.2mm, SIM908 can meet almost all the space requirements in user applications, such as M2M, smart phone, PDA, tracker and other mobile devices. SIM908 has 80 SMT pads, and provides all hardware interfaces between the module and customers’ boards. z Serial port and debug port can help user easily develop user’s applications. z GPS Serial port. z Two audio channels include two audio inputs and two audio outputs. These can be easily configured by AT command. z Charging interface. z Programmable general purpose input and output. z The keypad and SPI display interfaces will give users the flexibility to develop customized applications. z RF pad and connector interface. SIM908 is designed with power saving technique so that the current consumption is as low as 1.0mA in sleep
SIM908 Document - 2 - mode (GPS engine is powered down). SIM908 integrates TCP/IP protocol and extended TCP/IP AT commands which are very useful for data transfer applications. 1.2 SIM908 Key Features Table 1: SIM908 GSM/GPRS engine key features Feature Implementation Power supply 3.4V ~ 4.5V Power saving Typical power consumption in sleep mode is 1.0mA ( BS-PA-MFRMS=9, GPS engine is powered down ) Charging Supports charging control for Li-Ion battery Frequency bands z SIM908 Quad-band: GSM 850, EGSM 900, DCS 1800, PCS 1900. SIM908 can search the 4 frequency bands automatically. The frequency bands also can be set by AT command “AT+CBAND”. For details, please refer to document [1]. z Compliant to GSM Phase 2/2+ Transmitting power z Class 4 (2W) at GSM 850 and EGSM 900 z Class 1 (1W) at DCS 1800 and PCS 1900 GPRS connectivity z GPRS multi-slot class 10（default） z GPRS multi-slot class 8 (option) Temperature range z Normal operation: -20°C ~ +60°C z Restricted operation: -40°C ~ -20°C and +80 °C ~ +60°C* z Storage temperature -45°C ~ +90°C Data GPRS z GPRS data downlink transfer: max. 85.6 kbps z GPRS data uplink transfer: max. 42.8 kbps z Coding scheme: CS-1, CS-2, CS-3 and CS-4 z Integrate the TCP/IP protocol. z Support Packet Broadcast Control Channel (PBCCH) CSD z Support CSD transmission USSD z Unstructured Supplementary Services Data (USSD) support SMS z MT, MO, CB, Text and PDU mode z SMS storage: SIM card FAX Group 3 Class 1 SIM interface Support SIM card: 1.8V, 3V External antenna Antenna pad Audio features Speech codec modes: z Half Rate (ETS 06.20) z Full Rate (ETS 06.10) z Enhanced Full Rate (ETS 06.50 / 06.60 / 06.80) z Adaptive multi rate (AMR)
SIM908 Document - 3 - z Echo Cancellation z Noise Suppression Serial port and debug port Serial port: z Full modem interface with status and control lines, unbalanced, asynchronous. z 1200bps to 115200bps. z Can be used for AT commands or data stream. z Support RTS/CTS hardware handshake and software ON/OFF flow control. z Multiplex ability according to GSM 07.10 Multiplexer Protocol. z Autobauding supports baud rate from 1200 bps to 57600bps. Debug port: z Null modem interface GPS/DBG_TXD and GPS/DBG_RXD. z Can be used for debugging and upgrading firmware. Phonebook management Support phonebook types: SM, FD, LD, RC, ON, MC. SIM application toolkit GSM 11.14 Release 99 Real time clock Support RTC Physical characteristics Size: 30*30*3.2mm Weight: 5.2g Firmware upgrade Firmware upgradeable by debug port. *SIM908 does work at this temperature, but some radio frequency characteristics may deviate from the GSM specification. Table 2: GPS engine Performance Performance Parameter Description Min Typ Max Unit Horizontal Position Accuracy(a) Autonomous 2.5 m Speed - 0.01 - m/s Velocity Accuracy(b) Heading - 0.01 - ° Hot start - 1 - s Time To First Fix(c) Cold start - 30 - s Autonomous acquisition -143 dBm Sensitivity Tracking -160 dBm Channels 42 Update rate 1 Hz Receiver Altitude 18288 m
SIM908 Document - 4 - Velocity 1850 km/h Tracking L1, CA Code Protocol support NMEA,OSP Continuous tracking 76 mA acquisition 77 Power consumption(d) Power down current 0.03 uA Table 3: Coding schemes and maximum net data rates over air interface Coding scheme 1 timeslot 2 timeslot 4 timeslot CS-1 9.05kbps 18.1kbps 36.2kbps CS-2 13.4kbps 26.8kbps 53.6kbps CS-3 15.6kbps 31.2kbps 62.4kbps CS-4 21.4kbps 42.8kbps 85.6kbps
SIM908 Document - 5 - 2. Package Information 2.1 Pin out Diagram GNDGPS-ANTGNDGNDGPS-VANT-INGPS-VANT-OUTVCHGTEMP-BATDTRTXDDCDRIRXDCTSRTSGNDGNDVBATVBATGNDGND GNDGND GSM-ANTPWRKEYGNDNC GNDGND I2C-SDADISP-CLK I2C-SCLDISP-DATANCDIS P-D/C NCDISP-CS STATUSGND NETLIGHTPWM3PWM2PWM1ADCNCGPS/DBG-RXD NCSIM-DATAVDD-EXDSIM-RST GNDSIM-CLK VRTCSIM-VDD GNDSPK1NSPK1PMI C1PMIC1NSPK2NSPK2PMIC2PMIC2NNCNCGPIO1/KBR0GPIO2/KBR1GPIO3/KBR2GPIO4/KBC0GPIO5/KBC1GPIO6/KBC2GNDNCNCGND636261383940181920434241373334353629303132252627282122232417 4416 4515 4614 47SIM908TOP VIEW13 4812 4910 5111 509528537546555564573582596416068676665727170697675747380797877GPS/DBG-TXDNCNCNCGND Figure 1: SIM908 pin out diagram (Top view) 2.2 Pin Description Table 4: Pin description Pin name Pin number I/O Description Comment Power supply VBAT 62, 63 I Power supply 3.2V ~ 4.8V VRTC 42 I/O Power supply for RTC It is recommended to connect with a battery or a capacitor (e.g. 4.7uF).
SIM908 Document - 6 - VDD-EXT 44 O 2.8V output power supply If it is unused, keep open.GPS-VANT-OUT 75 O 2.8V output for GPS active antenna If it is unused, keep open.GPS-VANT-IN 76 I GPS active antenna power supply If it is unused, keep open.GND 1, 2, 5, 10, 14, 37, 40, 41, 43, 57, 58, 60, 61, 64, 65, 77, 78, 80 Ground Charge interface VCHG 74 I Charger input TEMP_BAT 73 I Battery temperature sensor Power on/down PWRKEY 3 I PWRKEY should be pulled low at least 1 second and then released to power on/down the module. Pulled up internally. Audio interfaces MIC1P 23 MIC1N 24 I Differential audio input SPK1P 22 SPK1N 21 O Differential audio output MIC2P 27 MIC2N 28 I Differential audio input SPK2N 25 SPK2P 26 O Differential audio output If these pins are unused, keep open. Status STATUS 52 O Power on status NETLIGHT 51 O Network status If these pins are unused, keep open. LCD interface DISP -CLK 6 O DISP-DATA 7 I/O DISP -D/C 8 O DISP -CS 9 O Display interface If these pins are unused, keep open. I2C interface I2C-SDA 56 O I2C serial bus data I2C-SCL 55 I/O I2C serial bus clock If these pins are unused, keep open. Keypad interface / GPIOs GPIO1/KBR0 31 GPIO1/keypad row 0 GPIO2/KBR1 32 GPIO2/keypad row 1 GPIO3/KBR2 33 I/O GPIO3/keypad row 2 If these pins are unused, keep open.
SIM908 Document - 7 - GPIO4/KBC0 34 GPIO4/keypad column 0 GPIO5/KBC1 35 GPIO5/keypad column 1 GPIO6/KBC2 36 GPIO6/keypad column 3 Serial port RXD 68 I Receive data TXD 71 O Transmit data RTS 66 O Request to send CTS 67 I Clear to send DCD 70 O Data carrier detect RI 69 O Ring indicator DTR 72 I Data terminal ready If only TXD and RXD are used, it is suggested to pull down DTR, and others pins can be kept open. GPS/Debug interface GPS/DBG-TXD 15 O GPS/DBG-RXD 16 I For GPS NMEA information output , debugging and upgrading firmware If these pins are unused, keep open. SIM interface SIM-VDD 20 O Voltage supply for SIM card. Support 1.8V or 3V SIM card SIM-DATA 17 I/O SIM data input/output SIM-CLK 19 O SIM clock SIM-RST 18 O SIM reset All signals of SIM interface should be protected against ESD with a TVS diode array. ADC ADC 47 I Input voltage range: 0V ~ 2.8V If it is unused, keep open.Pulse width modulation( PWM ) PWM1 48 O PWM PWM2 49 O PWM PWM3 50 O PWM If these pins are unused, keep open. GSM/GPS RF interface GSM-ANT 59 I/O GSM radio antenna connection Impendence must be controlled to 50Ω. GPS-ANT 79 I GPS radio antenna connection Impendence must be controlled to 50Ω. Not connect NC 4,11,12,13,29,30,38,39,45,46,53,54 - These pins should be kept open.
SIM908 Document - 8 - 2.3 Package Dimensions Figure 2: Dimensions of SIM908（Unit: mm） Figure 3: Recommended PCB footprint outline（Unit: mm）
SIM908 Document - 9 - 2.4 Pictures Figure 4: The RF interface of module 3. Detail Block Diagram Figure 5: Block diagram of SIM908 GPS Antenna connector GPS PAD GSM Antenna connector GSM PAD
SIM908 Document - 10 - 4. Electrical and Reliability Characteristics 4.1 Absolute Maximum Ratings The absolute maximum ratings stated in following table are stress ratings under non-operating conditions. Stresses beyond any of these limits will cause permanent damage to SIM908. Table 5: Absolute maximum ratings Symbol Parameter Min Typ Max Unit VBAT Power supply voltage - - 5.5 V VI* Input voltage -0.3 - 3.1 V II* Input current - - 10 mA IO* Output current - - 10 mA *These parameters are for digital interface pins, such as keypad, GPIO, I2C, UART, LCD, PWMs and DEBUG. 4.2 Recommended Operating Conditions Table 6: Recommended operating conditions Symbol Parameter Min Typ Max Unit VBAT Power supply voltage 3.2 4.0 4.8 V TOPER Operating temperature -40 +25 +85 ℃ TSTG Storage temperature -45 +90 ℃ 4.3 Digital Interface Characteristics Table 7: Digital interface characteristics Symbol Parameter Min Typ Max Unit IIH High-level input current -10 - 10 uA IIL Low-level input current -10 - 10 uA VIH High-level input voltage 2.4 - - V VIL Low-level input voltage - - 0.4 V VOH High-level output voltage 2.7 - - V VOL Low-level output voltage - - 0.1 V * These parameters are for digital interface pins, such as keypad, GPIO, I2C, UART, LCD, PWMs and DEBUG.
SIM908 Document - 11 - 4.4 SIM Card Interface Characteristics Table 8: SIM card interface characteristics Symbol Parameter Min Typ Max Unit IIH High-level input current -10 - 10 uA IIL Low-level input current -10 - 10 uA 1.4 - - V VIH High-level input voltage 2.4 - - V - - 0.4 V VIL Low-level input voltage 2.4 V 1.7 - - V VOH High-level output voltage 2.7 - - V - - 0.1 V VOL Low-level output voltage - - 0.1 V 4.5 VDD_EXT Characteristics Table 9: VDD_EXT characteristics Symbol Parameter Min Typ Max Unit VO Output voltage 2.70 2.80 2.95 V IO Output current - - 10 mA 4.6 SIM_VDD Characteristics Table 10: SIM_VDD characteristics Symbol Parameter Min Typ Max Unit 2.75 2.9 3.00 VO Output voltage 1.65 1.80 1.95 V IO Output current - - 10 mA 4.7 VRTC Characteristics Table 11: VRTC characteristics Symbol Parameter Min Typ Max Unit VRTC-IN VRTC input voltage 2.00 3.00 3.15 V
SIM908 Document - 12 - IRTC-IN VRTC input current - 2 - uA VRTC-OUT VRTC output voltage - 3.00 - V IRTC-OUT VRTC output current - 10 - uA 4.8 Current Consumption (VBAT = 3.8V, GPS engine is powered down) Table 12: GSM current consumption Symbol Parameter Conditions Value Unit IVRTC VRTC current VBAT disconnects. Backup battery is 3 V 2 uA Power down mode 50 uA BS-PA-MFRMS=9 1.2 BS-PA-MFRMS=5 1.5 Sleep mode BS-PA-MFRMS=2 1.7 mA GSM 850 EGSM 900 DCS 1800 Idle mode PCS 1900 21 mA PCL=5 240 PCL=12 110 GSM 850 EGSM 900 PCL=19 76 PCL=0 180 PCL=7 89 Voice call DCS 1800 PCS 1900 PCL=15 76 mA PCL=5 240 PCL=12 110 GSM 850 EGSM 900 PCL=19 83 mA PCL=0 170 PCL=7 95 Data mode GPRS(1Rx,1Tx) DCS 1800 PCS 1900 PCL=15 80 mA PCL=5 270 PCL=12 150 GSM 850 EGSM 900 PCL=19 120 mA PCL=0 210 PCL=7 130 Data mode GPRS(4Rx,1Tx) DCS 1800 PCS 1900 PCL=15 115 mA PCL=5 435 PCL=12 185 IVBAT VBAT current Data mode GPRS(3Rx,2Tx) GSM 850 EGSM 900 PCL=19 130 mA
SIM908 Document - 13 - PCL=0 320 PCL=7 155 DCS 1800 PCS 1900 PCL=15 122 mA IVBAT-peak Peak current During Tx burst 2 A 4.9 Electro-Static Discharge SIM908 is an ESD sensitive component, so more attention should be paid to the procedure of handling and packaging. The ESD test results are shown in the following table. Table 13: The ESD characteristics (Temperature: 25 , Humidity: 45 %)℃ Pin Contact discharge Air discharge VBAT ±5KV ±10KV GND ±4KV ±10KV RXD, TXD ±3KV ±6KV Antenna port ±5KV ±10KV SPKP/ SPKN MICP/ MICN ±3KV ±8KV PWRKEY ±3KV ±8KV 4.10 Radio Characteristics 4.10.1 Module RF Output Power The following table shows the module conducted output power, it is followed by the 3GPP TS 05.05 technical specification requirement. Table 14: SIM908 GSM 900 and GSM 850 conducted RF output power GSM 900 and EGSM 850 Tolerance (dB) for conditions PCL Nominal output power (dBm) Normal Extreme 0-2 39 ±2 ±2.5 3 37 ±3 ±4 4 35 ±3 ±4 5 33 ±3 ±4 6 31 ±3 ±4 7 29 ±3 ±4 8 27 ±3 ±4
SIM908 Document - 14 - 9 25 ±3 ±4 10 23 ±3 ±4 11 21 ±3 ±4 12 19 ±3 ±4 13 17 ±3 ±4 14 15 ±3 ±4 15 13 ±3 ±4 16 11 ±5 ±6 17 9 ±5 ±6 18 7 ±5 ±6 19-31 5 ±5 ±6 Table 15: SIM908 DCS 1800 and PCS 1900 conducted RF output power DCS 1800 and PCS 1900 Tolerance (dB) for conditions PCL Nominal output power (dBm) Normal Extreme 29 36 ±2 ±2.5 30 34 ±3 ±4 31 32 ±3 ±4 0 30 ±3 ±4 1 28 ±3 ±4 2 26 ±3 ±4 3 24 ±3 ±4 4 22 ±3 ±4 5 20 ±3 ±4 6 18 ±3 ±4 7 16 ±3 ±4 8 14 ±3 ±4 9 12 ±4 ±5 10 10 ±4 ±5 11 8 ±4 ±5 12 6 ±4 ±5 13 4 ±4 ±5 14 2 ±5 ±6 15-28 0 ±5 ±6 For the module’s output power, the following is should be noted: At GSM900 and GSM850 band, the module is a class 4 device, so the module’s output power should not exceed 33dBm, and at the maximum power level, the output power tolerance should not exceed +/-2dB under normal condition and +/-2.5dB under extreme condition.
SIM908 Document - 15 - At DCS1800 and PCS1900 band, the module is a class 1 device, so the module’s output power should not exceed 30dBm, and at the maximum power level, the output power tolerance should not exceed +/-2dB under normal condition and +/-2.5dB under extreme condition. 4.10.2 Module RF Receive Sensitivity The following table shows the module’s conducted receive sensitivity, it is tested under static condition. Table 16: SIM908 conducted RF receive sensitivity Frequency Receive sensitivity（Typical） Receive sensitivity(Max) GSM850 -109dBm -107dBm EGSM900 -109dBm -107dBm DCS1800 -109dBm -107dBm PCS1900 -109dBm -107dBm 4.10.3 Module Operating Frequencies The following table shows the module’s operating frequency range; it is followed by the 3GPP TS 05.05 technical specification requirement. Table 17: SIM908 operating frequencies Frequency Receive Transmit GSM850 869 ~ 894MHz 824 ~ 849 MHz EGSM900 925 ~ 960MHz 880 ~ 915MHz DCS1800 1805 ~ 1880MHz 1710 ~ 1785MHz PCS1900 1930 ~ 1990MHz 1850 ~ 1910MHz

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