Sunitec Enterprise BM64C2 Bluetooth module User Manual SPEC BM64C1

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Document Description	User manual part 1
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Date Submitted	2017-07-28 00:00:00
Date Available	2017-07-28 00:00:00
Creation Date	2017-07-28 17:20:13
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Document Title	~$SPEC-BM64C1
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@itea®
Features
* Qualified for Bluetooth v4.2 specifications
‘ Supports 111-71) 1.6,11SP 1.2, AZDP 1.3, SPP 1.2 and
AVRCP 1.6
* Supports Bluetooth 4.2 dual-mode (BDR/EDR/ BLE)
specifications (FW dependent)
* Stand-alone module with on-board PCB antenna and
Bluetooth stack
* Supports high resolution up to 24-bit, 96 kHz audio data
format
* Supports to connect two hosts with HFP/AZDP profiles
simultaneously
' Transparent UART mode for seamless serial data over
UART interface
' Supports virtual UART communication between host
MCU and smartphonc applications hy Bluetooth SPF or
BLE link
' Easy to configure with Windows® GUI or directly by
external MCU
' Supports firmware field upgrade
' Supports one microphone
' Compact surface mount module:32 x 15 x 2.7 mm
' Castellated surface mount pads for easy and reliable host
PCB mounting
- RoHS compliant
- Ideal for portable battery operated devices
- Internal hattery regulator circuitry DSP Audio Processing
' Supports 64 kbps A-Law. -Law PCM format/
Continuous Variable Slope Delta (CVSD) modulation for
SCO channel operation
- Supports 2/15 kH7 noisc suppression
- Supports 2/15 kH7 echo cancellation
- Supports Modified Sub-Band Coding (MSBC) for wide
band speech
- Built-in High Definition Clean Audio (HCA) algorithms
for both narrow band and wide band speech processing
' Packet loss concealment (PLC)
' Builtrin audio effect algorithms to enhance audio
streaming
Peripherals
* Built-in lithium-ion and lithium-polymer battery
charger (up to 350 mA)
* Integrated 1.8V and 3V configurable switching
regulator and low-dropout (LDO) regulator
' Built-in ADC for battery monitoring and Voltage
sense
' Built-in ADC for charger thermal protection
' Built-in undervoltage protection (UVP)
' An AUX-1n port for external audio input
* Two LED drivers
* Multiple I/O pins [or control and status
HCI Interface
- Hi ghrspccd HCLUART interface (supports up to
921,600 bps)
Product Specification
BM64C1 BT42 Stereo Audio Module
13 Bluetooth' Qualifie
ISZDG4GM
(This Photos are for reference only)
RF/Analog
* Frequency spectrum: 2.402 Gilz to 2.480 GHz
* Receive sensitivity: -90 dBm (2 Mbps EDR)
* Output Power
- BM64 Class 1: '15 dBm typical
- BM64 Class 2: '2 dBm typical
Audio Codec
' Sub-band Coding (SEC) and optional Advanced Audio
Coding (AAC) decoding
' 20-bit digital-to-analog converter (DAC) with 98 dB SNR
' 16-bit analog-to tal converter (ADC) with 92 dB SNR
' Suppons up to 24-bit, 96 kHz 12S digital audio
MAC/Baseband Processor
- Supports Bluctooth 4.2 dual-mode (rw dependent)
- BDR/EDR transport for audio» voice, and SPP data
exchange
- BLE transport for proprietary transparent service and
Apple Notification Center Service (ANCS) data exchange
Operating Condition
* Operating voltage: 3.2V to 4.2V
* Operating temperature: -20°C to +70°C
Description
The BM64 Stereo Audio module is a Fully qualified
Bluetooth 4.2 dual-mode (BDR/EDR/BLE) module for
designers to add wireless audio and voice applications to
their products The BM64 module is a Bluetooth Special
Interest Group (SIG) certified module that provides a
complete wireless solution with Bluetooth stack, integrated
PCB antenna, and worldwide radio certifications in a
compact surface-mount package.
The BM64 module has several SKUs. The BM64 module is
available in both Class 1 and Class 2 versions.
Applications
' Soundbar and Subwoofer (FW dependent)
* Bluetooth portable speaker phone
* Multi-speakcr (FW dependent)
Spec-BM64-VO.3
Page 1 of 32
www.5unitec-en.com
- ®
Elmo
—
' Product Specifi ation
LI] DEVICE OVERVIEW
The BM BM64 Stereo Audio modules are built around Microchip Technology 152064 SoCs respectively.
The ISZUM SoC integrates the Bluetooth 4.2 dual mode radio transceiver, Power Management Unit (PMU), a crystal
and DSP. Users can configure the BM64 module by using the UI tool and DSP tool, a Windows-based utilityv
Note: The UI and DSP tools are available for
download from the MICI‘OCI'IID wet: site at
www microchip com ‘BMIM
Figure 1-1 illustrates atypical example ofthe Class I BM64 module which is connected to an external MCU and a
DSP/eodeci
FIGURE 1-1: APPLICATION USING BM64 MODULE
M-imphonr
BM64 \
I25
up PA ,/
S.) ’
IszosaeM 16 MM UARY
Ciyslal /
Mn \\ /
Figure 1-2 illustrates the Soundhar and Suhwuofer applications using the BM64 module.
FIGURE 1-2: SOUNDEAR AND SUBWOOFER APPLICATIONS USING EM64 MODULE
I'sim /
Smwmlu
Figure 173 illustrates the Soundbar and Subwnofcr applications using the BM64 module and smartphone.
FIGURE 1.3: SOUNDBAR AND suawoona
APPLICATIONS USING BM64 MODULE AND SMARTPHONE
o)»
Lil-1))
tVW-o)
W...”— n
mum, )mwwlei
Spec-BM64-V0.3 Page 2 of32 www.5unitec-cn.com
: Product Spemficalion
Figure 1-4 illustrates the Multi-speaker application using the BM64 module.
FIGURE 1-4: SOUNDBAR AND SUBWOOFER
APPLICATIONS USING IM64 MODULE AND SMARTPHONE
>fl~4>>
Table 1.1 provides the key features ofthi: BM64 module.
TABLE 1-1: BM62I64 KEY FEATURES
Feature BM64 CLASS 2 BM64 CLASS 1
Application MultivspeakerlSoundbar/Subwoofer
Stereolmono Stereo Stereo
Pin count 43 43
DImenstons (mmz) 15 x 32 15 x 32
PCB antenna Yes Yes
Tx power (typical) 2 dBm 15 dBm
Audio DAC output 2 Channel 2 Channel
DAC (single-ended) SNR at 2.8V ((18) -98 -98
DAC (capless) SNR at 2.8V (dB) -98 -98
ADC SNR at 2 8V (dB) -92 -92
IZS digital interface Yes Yes
Analog AUX-in Yes Yes
Mono MIC 'l 1
External audio amplifier Interface Yes Yes
UART Yes Yes
USB Yes Yes
LED driver 2 2
lntemal DCeDC step down regulator Yes Yes
DC 5V adapter input Yes Yes
Battery charger (350 mA max) Yes Yes
ADC for thermal charger protection Yes Yes
Unden/oltage protection (UVP) Yes Yes
GPIO 12 12
Button support 6 6
NFC (triggered by external NFC) Yes Yes
EEPROM Yes Yes
Spec-BM64-VO.3 Page 3 of 32 www.5unitcc-cn.com
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E Product Specification
Feature BM64 CLASS 2 EM“ CLASS 1
Customized VOIce prompt 8K Sampling Rate, Stored In EEPROM
with apprOXImately 800 bytes/second
Multi-tone Yes Yes
DSP sound effect Yes Yes
BLE Yes Yes
Bluetooth profiles
HFP 1.6 1.6
AVRCP 1.6 1.6
A2DP 1,3 1.3
HSP 1.2 1.2
SPP 1,2 1.2
FIGURE 1-5:
Figure 1-5 illustrates the pin diagram ofthe BM64 module.
BM64 MODULE PIN DIAGRAM
DR!) 1 GND
RFSD 2 P2_1
SCLKD I! P2_fl
on: 4 PD_2
AOHFH 5 Pa_s
AOHPM a Pu
AOHFL 7 93,1
ulc_m a P3_0
111011 9 POAS
MICJIAs 111 DP
AIR 11 um
AIL 12 an
1151 u 1:1 mm
GND 14 93,5
P1 2 15 P3 1
PLS 1e LED1
NM 11 LED:
seaxzsasa
15‘ a I: g 5 g 1: h n
:ééggggai
_ — ll
33>“335
Spec-BM64-V0.3 Page 4 of 32 www.5un1tec-cn.com
@itec®
: Product Specification
BM64 MODULE PIN DESCRIPTION
Pin No Pin Type Pin Name Description
1 II’O DRO lZS Interface dIgItal leftlngm data
2 IIO RFSO IZS Interface: left/right clock
3 l/O SCLKO lZS Interface bIthock
4 HO DTO lZS Interface: dIgital leftlnght data
5 O AOHPR RIght-channel‘ analog headphone output
6 O AOHPM Headphone common mode output/sense Input
7 O AOHPL Leftechannel, analog headphone output
22 P BAT_IN Battery Input Voltage range 3,2V to 4 2V. When an external
power supply Is connected to the ADAPilN pin, the BATilN
pIn can be left open if battery is nol connected
23 P ADAP_|N 5V power adapter Input
24 P SYS_PWR System power output derived irom ADAPfiIN or BATilN
25 P AMB_DET Analog Input for ambIent temperature detectIon
26 | MFB - MultI—Functlon Button and power-on key
. UART RXVIND: active-hlgh (used by host MCU to
wakeup the Bluetooth system)
27 | LEDZ LED dnver 2
28 | LEDl LED driver 1
Legend: 1: Input pin 0: Output pIn 1/0: Input/Output pin P: Power pin
Note: All [/0 pins can be configured using the UI tool, a Windows utility.
Spec-BM64-V0.3
Page 5 of 32 www.5unitec-cn.com
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Product Specification
BM64 MODULE PIN DESCRIPTION (CONTINUED)
Pin No
Pin Type
Pin Name
Description
29
l/O
P3]
Configurable control or Indication pin
(Internally pulled-up. if configured as an input)
UART TX_IND, active-low (used by Bluetooth system to
wakeup the host MCU)
30
IIO
P3_5
Configurable control or indication pin
(Internally pulledaup, if configured as an input)
- Slide swflch detector, active-high
31
IIO
P0_0
Configurable control or Indication pin
(Internally pulled-up, if configured as an input)
- Slide sWitch detector, activerhigh, Out_lnd_0
32
EAN
External address bus negative
System configuration pin along With the P2_0 and P2_4 pins
used to set the module in any one of these modes:
' Application mode (for normal operation)
. Test mode (to change EEPROM values)
- Write Flash mode (to load a new firmware into the mod-
ule) refer to Table 54
Flash must be pulledoown with 4 7 kOtim to GND
33
IIO
DM
Differential data»minus USB
34
IIO
DP
Difierential data-plus USB
35
NO
P0_5
Configurable control or indication pin
(Internally pulled-up. if configured as an input)
Volume-down key {default}. active-low
36
NO
P3_0
Configurable control or indication pin
(Internally pulledrup. if configured as an input)
AUX-In detector, active-low
37
NO
P3_1
Configurable control or indication pin
(Internally pulledvup, if configured as an input)
REV key (default), active-low
33
NO
P3_3
Configurable control or indication pin
(Internally pulled-up. if configured as an input)
FWD key (default). active-low
39
NO
P3_6
Configurable control or indication pin
(Internally pulled-up, if configured as an input)
Multi-SPK Master/Slave mode control (FW dependent)
40
NO
P0_2
Configurable control or indication pin
(Internally pulled-up. if configured as an input)
Play/Pause key (default)
41
l/O
P2_0
System configuration pin along With P2_4 and EAN pins used
to set the module in any one of the followmg modes
- Application mode (for normal operation)
' Test mode (to change EEPROM values)
' Write Flash mode (to load a new firmware into the mod-
ule), refer to Table 571
42
IIO
P2_7
Configurable control or indication pm
(Internally pulled-up, if configured as an input)
Volumerup key (default), activerlow
43
GND
Ground reference
Legend: 1: Input pin 0: Output pin 1/0: Input/Output pin 17: Power pin
Note: All [/0 pins can be configured using the UI tool, a Windows utility.
Spec-BM64-V0.3
Page 6 of 32 www.5unitcc-cn.com
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: Product Specification
2.0 AUDIO
The input and output audios have different stages and each stage can be programmed to vary the gain response
characteristics. For microphone, both single ended inputs and differential inputs are supported.
To maintain a high quality signal, a stable bias voltage source to the condenser microphone’s PET is provided.
The DC blocking capacitors can be used at both positive and negative sides efa input. Internally, this analog signal is
convened to 16-bit, 8/16 kH7 linear PCM data.
2.] Di 'tal Signal Processor
A Digital Signal Processor (DSP) is used to perform speech and audio processing. The advanced speech features, such
as acoustic echo cancellation and noise reduction are inbuilt. To reduce nonlinear distortion and to help echo
cancellation, an outgoing signal level to the speaker is monitored and adjusted to avoid saturation ofspeaker output or
microphone input. Adaptive filtering is also applied to track the echo path impulse in response to provide echo free and
full-duplex user experience.
The embedded noise reduction algorithm helps to extract elean speech signals from the noisy inputs captured by the
microphones and improves mutual understanding in communication.
The advanced audio features, such as multi-band dynamic range control, parametric multi-band equalizer, audio
widening and virtual bass are inbuilt. The audio effect algorithms are to improve the user’s audio listening experience in
terms ofbetter audio quality after audio signal processing.
Figure 2-1 and Figure 2-2 illustrate the processing flow of speakerphone applications for speech and audio signal
processing.
FIGURE 2-1: SPEECH SIGNAL PROCESSING
mum ,
m m
we
-- u m m
FIGURE 2-2: AUDIO SIGNAL PROCESSING
BM62/64
DSP
Alumna
i i
‘ MCJ . sEeA/ic fl. Amm _..l “Rim HIM/5i» Auitri _‘1
Dammit: Eflecl 1 Amp
Spec-BM64-VO.3 Page 7 of 32 www.5unitcc-cn.com
: Product Spemfiealion
The DSP parameters can be configured using the DSP tool. For additional information on the DSP tool, refer to the
“IS206X DSP Application Note".
Note: The DSP tool and “ISZOSX DSP Applica—
tion Note” document, are available for
download from the Microchip web site at:
www microchipcomi‘BM64,
2.2 Codec
The built-in oodec has a high signal-to-noise ratio (SNR) performance and it consists of an ADC, a DAC and an
additional analog circuitry.
Note: The internal codec supports 16-bit resolu-
tion, b adding trailing zeros in LSBs
24-bit | 8 port requirements can be met.
Figure 2.3 through Figure 2-6 illustrate the dynamic range and frequency response ofthe cedee,
FIGURE 2-3: CODEC DAC DYNAMIC RANGE
10
710
720
A ‘30 .
a 740 —Singl916{LCHl
'u .
5' '23 —Single160_CH2
it _70 —Caplessl$0_CH1
'30 —Caple5516()_CH 2
-90
~100 , l i i
7100 790 780 ,70 760 750 ,40 730 720 710 0
Input power (dBFS)
Note: The data corresponds to the 16 Ohm load With 2 8V operating voltage at +25=C room temperature
FIGURE 24: CODEC DAC THD+N VERSUS INPUT POWER
,10 7
,20 _ ,
a -30
3 _ —Single16Q_CH1
E ' —Single16Q_CH2
I—
—Caple55160_CH1
—Caple55160_CH2
i i , i , , i i
~60 .55 ,50 -45 -4O 735 ~30 ,25 ~20 ,15 ,10 -5 0
Input power (dBFS)
Note: The data corresponds to the 16 Ohm load With 2 3V operating voltage at +25‘C room temperature
Spec-BM64-VO.3 Page 8 of 32 www.5unitcc-cn.com
Product Specification
-‘ 5
~I 55
4 5
~10:
4 1
.| 75
-( a
-| a:
4 i
FuunCM I 46V
100 ‘k
std—:19 u, meneymz
Eur-mind Mahmud inn-m “Vim
mm mm ”"223” com:
FIGURE 2-62 CODEC DAC FREQUENCY RESPONSE (SINGLE-ENDED MODE’
In...» I ~ "an” mm... Avm'v/rv um \.
5"“) («Vinyl
mm ,
wan-no m
WIN
a” hen ‘. m:
hum ‘
(and '
Sam M u“Frequency I H:
in: warm mum-mm «aw how-mo
Mum
Znam “mm“ canto
may emu um
Note: The DAC frequency response corresponds IO smgle-ended mode With a 47 HF DC block capacutov
Spec-BM64-V0.3 Pagc 9 of32 www.5unitcc-cn.com
Product Specification
2.3 Auxiliary Port
The BM64 module supports one analog (line-in) signal from the external audio source. The analog (line-in) signal can
be processed by the D5? to generate different sound effects (Multi-band dynamic range compression and audio
widening), which can be configured by using the DSP tool.
24 Analog Speaker Output
The BM62/64 module supports the following analog speaker output modes:
' Capless mode 7 Recommended for headphone applications in which capless output connection helps to save the
ROM cost by avo' ng a large DC blocking capacitor, Figure 2-7 illustrates the analog speaker output capless mode
' Single-ended mode 7 Used for driving an external audio amplifier where a DC blocking capacitor is required. Figure
2-8 illustrates the analog speaker output single-ended mode
FIGURE 2-7: ANALOG SPEAKER OUTPUT CAPLESS MODE
3M62/64
AOHPR
# AOHPM
AOHPL
16/32 Ohm Speaker
FIGURE 2-8: ANALOG SPEAKER OUTPUT SINGLE-ENDED MODE
l— BM62l64
l7
, | l . AOHPR
\ Audio Amplifier
\fi 4| l7 AOHPL
3.0 TRANSCEIVER
The BM64 module is designed and optimized for Bluetoolh 2.4 GHz system. It contains a complete radio [requency
transmitter/receiver section. An internal synthesizer generates a stable clock for synchronizing with another device,
3.] Transmitter
The internal power amplifier (PA) has a maximum output power of+4 dBm. This is applied for Class 2 or Class 3
radios Without an external RF PA. The transmitter performs the IQ conversion to minimi7e the frequency drift.
Spec-BM64-VO.3 Page 10 of 32 www.5unitec-cn.com
@itec‘j
3.2 Receiver
The low-noise amplifier (LNA) operates with TR-combined mode for single port application. It can save a pin on the
package without having an external Tx/Rx sWitch.
Product Specification
The ADC is used to sample the input analog signal and convert it into a digital signal for demodulator analysis,
A channel filter has been integrated into the receiver channel before the ADC, which is used to reduce the external
component count and increase the anti-interference capability,
The image rejection filter is used to reject the image frequency for low-IF architecture. This filter for low-IF
architecture is intented to reduce external Band Pass Filter (err) component for a super heterodyne architecture
The Received signal Strength Indicator (RSS1) signal feedback to the processor is used to control the RF output power
to make a good trade-off for effective distance and current consumption.
3.3 Synthesizer
A synthesizer generates a clock for radio transceiver operation. There is a VCO inside with a tunable internal LC tank
that can reduce variation for components, Aerystal oscillator with an internal digital trimming circuitprovtdes a stable
clock for the synthesi7err
3.4 Modem
For Bluetooth 1.2 specification and below, 1 Mbps was the standard data rate based on the Ga 'an Frequency Shift
Keying (GFSK) modulation scheme. This basic rate modem meets Basic Data Rate (BDR) requirements ofBluetooth
2.0 with Enhanced Data Rate (EDR) specifications.
For Bluetooth 2.0 and above specifications, EDR has been introduced to provide the data rates 01‘1/2/3 Mbps. For
baseband, both BDR and EDR utilize the same 1 MHz symbol rate and 1.6 mt slot rate. For BDR, symbol 1 represents
1-bit. However, each symbol in the payload part ot‘EDR packet represents 2 3 bits. This is achieved by using two
different modulations. 7t /4 DQPSK and 8 DPSK.
3.5 Adaptive Frequency Ilnpping(AFIl)
The BMbZ/M module has an AFH function to avoid RF interference. [t has an algorithm to check the nearby
interference and to choose clear channel for transceiver Bluctnoth signal.
4.0 POWER MANAGEMENT UNIT
The on-chip Power Management Unit (PMU) has two main features: lithium-ion and lithium-polymer battery charger,
and voltage regulator A power switch is used to svtitch over the powcr source between the battery and an adapter. Also,
the PMU provides current to drive two LEDs.
4.] Charging a Battery
The BM62/64 module has a built-in battery charger which is optimized for lithium-ion and lithium-polymer batteries,
The battery charger includes a current sensor for charging control, user programmable current regulation, and high
accuracy voltage regulation. The charging current parameters are configured by the U] tool. Reviving, pre-charging,
constant current and constant voltage modes, and recharging functions are included, The maximum charging currcnt is
350 mA,
Figure 4-1 illustrates the charging curve ofa battery.
Spee-BM64-V0.3 Page 1] of32 www.5unitee-cn.com
@itea®
Rerhurpe Vinnie .
4.I\
: Product Specification
FIGURE 4-1: BATTERY CHARGING CURVE
ei't' . . . ‘ R h x
C\' Voltage 4 2\‘ “thin!“ “hm? L ('ullslulH uiieiu Mode 4‘ ( tint-rain viiluige Mine 4 L iii-3T
CC eulrellt 0 5e
Ivreehnrge VtiIlilg
: 5i
l‘rechalgt ( urmu
0 IL
Remingt urmu ,
Dru-t
4.2 Voltage Monitoring
A 10-bit, successive approximation register ADC (SAR ADC) provides a dedicated channel for battery voltage level
detection. The warning level can he programmed by using the UI tool. The ADC provides a granular resolution to
enable the external MCU to take control over the charging process.
4.3 LED Driver
Two dedicated LED drivers control the LEDs. They provide enough sink current (16 step control and 0.35 mA for each
step), thus l/EDs can be connected directly with the BM62/64 module. The LED settings can be configured using the UI
tool.
Figure 4-2 illustrates the LED drivers in the BM62/64 module.
FIGURE 4-2: LED DRIVER
BM62/64
SYS_PWR
——D¢—— LEDl
fig}— LEDZ
4.4 Under Voltage Protection
When the voltage of the SYSiPWR pin drops below the Voltage level of2.9V. the system will shutdown automatically.
4.5 Ambient Detection
The BM64 module has a built-in ADC for charger thermal protection. Figure 4-3 illustrates the suggested circuit and
thermistor, Murata NCP] SWFIOAF. The charger thermal protection can avoid battery charge in restricted temperature
range, The upper and lower limits for temperature values can be configured by using thc Ul tool.
Spec-BM64-VO.3 Page 12 of 32 www.5unitec-cn.com
: Product Spemfieatlon
Note: Thermistor must be placed close to the
battery in the user application for accurate
temperature measurements and to enable
thermal shutdown feature,
FIGURE 4-3: AMBIENT DETECTION
VDD_IO
R1
1M/1%
AMB_DET
C1 R2
1 F, 16V
” ; saw/1%
TR1
100K
Thermistor: Murata NCP15WF104F
5.0 APPLICATION INFORMATION
5.] Host MCU Interface
The BM64 mudule supperts UART cemmands. The UART cnmmands enable an external MCU te centre] the BM54
medule. Figure 57] illustrates the UART interface between the BM54 module and an external MCU,
FIGURE 5.1: HOST MCU INTERFACE OVER UART
MCU BM62I64
WW smegma;
UART_RX ”ART "“8"” HCI_TXD
UARTJX ”ART ““3"“! HCLRXD
BT‘WAKE up MFB
An extemal MCU can control the BMM module over the UART interface and wakeup the module with the MFB, P3_7
Spec-BM64-VO.3 Page 13 of 32 www.5unitec-cn.com
Product Specification
pins.
Refer to the “UART_CommandSet" document for a list of functions the BM64 module supports and how to use the UI
tool to configure the UART and UART Command Set tool.
Note: The UART Command set tool (SPKCom-
mandSetTool v160.xx) and “UART_Com-
mandSet" document are available for
download from the Microchip web Site at,
wwwmicrochrpcomiBM64
Figure 5-2 through Figure 5-7 iliustrate the liming sequences of various UART control signals.
FIGURE 5-2: FOWER-ON/OFF SEQUENCE
1 ms
0, ~ ~ , . A or » 7- ‘ A
EAUN » >, x .
I» —~
svsjwn
”W .51 W ” v mat din
MCU mam WW " m‘"
mu ms him.
we (MR) y n
—,—
ax rout/moswo i ' ‘ ‘° "‘5
” ‘ Km all was
> < zu ms >23. and MCU
R51 N I conneclionm
a; low level
i may Mcuwialnwm
MCU mm UART WNW I] 7 cmmm nu um Cmmmu
(BMEI umnm WW“ Ac 1 C
Buszsa moons: UART state , V " ‘ ‘
IBMEA UARLTXI
(590 Figure 54) 1552 Figure 54)
Set ‘anmjn Dimdiy' mm EM64 u-swnmci am lulu wwv-ofl
FIGURE 5-3: TIMING SEQUENCE OF RX INDICATION AFTER POWER-ON STATE
Resume 32 kHz mode MFB pulse must be longer than the
UART command slot time
>— 150 ms ,
MFB (PWR)
MCU sends UART command ‘
UART
Command
2 ms 2 ms
Enter 32 kHz mode
tms
Spoc-BM64-VO.3 Page 14 of 32 www.5unitec-cn.com
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: Product Speuficanon
FIGURE 5-4: TIMING SEQUENCE OF POWER-OFF STATE
BM62164 sends power-o" ACK ,
BAT_IN 94V
MFB (PWR)
MCU sends RST_N
BK_OUT
LDOS1_V0
UART bus W ,
< ><>
2: Is
Note 1: EEPROM clock = 100 kHz
2: F0! 3 ber write, 1101 ms x 32 clock x 2 = 640 us,
3: It IS recommended to have ramp-down me more than 640 us dunng the power-of! sequence to
ensure safe operation of the device,
FIGURE 5-52 TIMING SEQUENCE OF POWER-ON (NACK)
I "‘5
. 4
I; II
EALIN , 7 ' 0
SVS_FWR ,,
Poni- ’/
u. I men
Mcu stale .w'l-I' L 7.777 V7 m 7 7. , , .
moms ' ‘200ms ’ ”my.
MFE (m; , , g ,I
' v
aKpuT/LooaLvo 7r '7 ‘ '° '"‘
‘ '
RSTWN q ’ 2° "”5
MCU sends UART command ‘. ,
(3mm uARLRX) , I:
max
aMsz/aA mfipunm UART mm . 7
[BMBZ/SA uAR'er)
WI“
New, .1 ACK Is not received
Sal 'Pmrm olmaty' boot Maximum 5 mm (Is)
Spec-BM64-V0.3 Page 15 of 32 www.5unitec-cn.com
— Product Spemficatlon
FIGURE 5-7: TIMING SEQUENCE OF POWER DROP PROTECTION
Power ‘
‘ l 2 av
BAT_IN +4v ‘ 5'5 PW“
emu
RSTAN Irom Reset IC , Reset .
t t _
MCU Reset
Note 1: It is recommended to use the battery to prowde the power supply at BAT_IN In to the module,
2: If an external power source or a power adapter is utilized to prowde power to the module (ADAP_IN). rt
Is recommended to use a voltage supervisor to.
3: The Reset IC output pmv RSTAN, must be ‘Open dram" wrtn delay time .7 10 ms and the recommended
part is 6691L293T73,
5.2 IZS Mode Application
The BM64 module provides an 125 digital audio output interface to connect with the external codee or DSP. It provides
8, 16, 44.1, 48, 88.2, and 96 kHz sampling rates for 16-bit and 24-bit data formats. The 125 setting can be configured by
using the U1 and DSP tools.
Figure 5-8 and Figure 5-9 illustrate the 125 signal connectienhetween the BMo4 module and an external 05?, Use the
DSP tool to configure the BM64 module as a Master/Slave. For additional information on timing specifications, refer to
Spec-BM64-VO.3 Page 16 of 32 www.5unitcc-cn.com
@itea®
: Product Specification
8.2 “Timing specifications".
FIGURE 5-8: BM64 MODULE IN IIS MASTER MODE
External DSP/ BM64
Codec
BCLK SCLKO
DACLRC <— RFSO
ADCDAT —> DRO
DACDAT l4— DTO
5.3 Reset
The BM64 module provides a watchdog timer (WDT) to reset the chip. It has an integrated Power-on Reset (POR)
circuit that will reset all circuits to a known Power-on state. This action can also be driven by an external Reset signal
which is used to control the device externally by forcing it into a POR state. The RSTiN signal input is active-low and
no connection is required in most applications.
5.4 External Configuration and Programming
The BM64 module can be eonfigured by using an cxtcmal configuration tool (EEPROM tool) and the firmware is
programmed by using a programming tool (Flash tool),
Note: The EEPROM and Flash tools are avail-
able for download from the Microchip web
www microchip comi‘BMe4
Figure 5715 through Figure 5713 illustrate the BMh4 referenee circuit for a stereo headset application.
Spec-BM64-VO.3 Page 17 of 32 www.5unitcc-cn.com
@uec®
Product Specification
FIsURE 5-15: EM64 REFERENCE cIRCUIT FoR sTEREo HEADSET APPLICATION
MC BIAS
meme
AIR
-- “‘ BMB4
as: N
A7W|DV END,
= P172
w 3
p074
CODECJIO
FIGURE s45: BM64 REFERENCE CIRCUIT FOR sTEREo HEADSET APPLICATION
TEST POINTS GPIO Description
’W m AWN MFB UART RXJND' MFB
HCI_RXD w Amp w ‘ ' ’
'H W F072 PLAYIFAUSE
HCI_TXD w sun . ‘ I
P2 0 m7 EAT m‘ P2_1 VOL‘
— + .
m m‘ Po_5 VOL»
“N _m an" ' ‘ Pu_o SLIDE SWITCH
I m
”FE VP” P074 AMPiEN§ NFE
. as N me
RESET ‘N mm In U47 Pz_n Auxm Dmctmn
1:56 V M: P1 _ YFN 1 AONPR
MICI ‘ ‘ m m SPEAKER m2 F3_1 REv
A OUTPUT , 1 mm
PL: FWD
P3_7 UART_TX_IND
P1_5 AMI-LEN; SLIDE SWI'ICH
Slngle I Double Belting
P3_6 Slngle 1 Double selling
P2_o System Conilaurauon
EAN Systmn configuranon
Spcc-BM64-VO.3
Pagc 18 of 32
www.5unitcc-cn.com
: Product Spemficatlon
FIGURE 5-17: BM64 REFERENCE CIRCUIT FOR STEREO HEADSET APPLICATION
MFB RESET
AMB_DET
VB“ 3 _l ‘ cvsj/vn ‘ 4.1.
x ‘ 'rr 2 Mrs -||‘ 3 ,_,
SWV Y ‘ 5W2
mm
nuau
PLAY/PAUSE—Iu
I ¢ 5w; 3 :aa
‘|__| ‘5p/5LV
x 2 1—.- 1
sertr _
_ REV m < FIND m 1
NCF15WF104F03 A SW4 3 h 6W5
X H 7:57pm x‘ E a
x 2 W 1 x 2 W V
W J__ WW
VOL— P“ VOL+
x NW” 3 L L 3
x 2 W { T‘sp‘EN 2 'I—l' ‘ Wm
Wmc J: WW ___
STEREO AUX LINE INPUT
STEREO SPK JACK
mac Low Act”. Pr
Lin. In Ditnc: wrzru 7:1
”zagorsvzz
I’ A
5 fit an;
"I m L w
—0w: :ms
Spec-BM64-VO.3 Pagc 19 of 32 www.5unitcc-cn.com
@itec®
FIGURE 5-18:
Product Specification
BM64 REFERENCE CIRCUIT FOR STEREO HEADSET APPLICATION
SY5_FWR
~L
swe I
sw- IBfl VDD_IU
~r‘
SLIDE SWI TCH
as
5152301 5 2 suns sw , mu
, , 5152305
N35 3
’ F‘ 5
, R77
9 m
(J
RESERVE For
BLUETOOTH DEBUG
no 1 _
E"—'""EM—,T 2 8
mam ‘ o
HCI VXD 6 g
I 7
hfif o
I t7 a
Jsz
ACAF'_II\
:czc :C18
0 mav
I25 INTERFACE
frame
tranb
Emmi
Serial data
I tmsv
:xansnut
LED
BLUE
,Em
RED
Audi? AMPL [nails 7
EinNE
TXiINL
nm nu
NFC
MODE
MODE
5px
SPK
12c
12c
fHG/MDETtLTnd.
BATTERY CONNECTOR
BATJN
Vets
a NMSV
JP txa
LtAM
if 0 VI
LED2
.592 2 @J‘ED'HR
UART CONTROL
tsm
svs PWR
LEDVE ,
7121:
a twev
4L,
ocxocoaolI
P3 7
EMBLELE
::ct7
IHIIEV
6.0 PRINTED ANTENNA INFORMATION
6.1 Antenna Radiation Pattern
The BM64 module is Integrated with one PCB printed antenna, see Figure 5-1.
Spcc-BM64-VO.3
Pagc 20 of 32
www.5unitcc-cn.com

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