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BM8670 and BM8675 Advanced Bluetooth Module Datasheet V1.1

 

 

BM8670 and BM8675

Advanced Bluetooth Mode Module

Bluetooth Audio, Low Energy and EDR

(Based on CSR8670 and CSR8675 chip)

User Manual and Datasheet

 

V1.1 2018-05-20

Applications

Home Entertainment Ecosystem

l                      TVs

l                      Smart remote controllers

l                      Wired or wireless soundbars

l                      Wired or wireless speakers and headphones

Tablets / PCs / Mobile Connectivity

l                      Wearable audio (on-the-go)

l                      Wearable audio with sensors (health and wellbeing applications)

l                      Wired or wireless stereo headphones for music/gaming/multimedia content

l                      Wired or wireless speakers

l                      Wired or wireless speakerphones

l                      Mono headsets for voice

Device Description

l                      Device Name:

I                      BM8670

I                      BM8675

l                      Fully qualified dual mode Bluetooth® v5.0 system

l                      Bluetooth Audio, Bluetooth Low Energy (BLE) and EDR support

l                      HFP 1.6, A2DP 1.3.1, AVRCP 1.6, HOGP 1.0, FMP 1.0, PXP 1.0, BAS 1.0, TPS 1.0

l                      1 or 2-mic Qualcomm® cVc™ 8th Generation voice processing technology with wideband speech

l                      BM8670 based on CSR8670 chip and support Qualcomm® aptX™ and aptX Low Latency

l                      BM8675 based on CSR8675 chips and support Qualcomm® aptX™ HD and aptX Low Latency

l                      Support Qualcomm TrueWireless Stereo (TWS)

 

Ordering Information: 

Device Name

Package

Ordering Number

Pin Type

Size

Shipment Method

BM8760

50 pins

interval stamp bonding pads

17 x 15 x 2.74 mm

Plastic Tray

BM8670

BM8675

17 x 15 x 2.74 mm

Plastic Tray

BM8675

Index

Ordering Information:        

Device Details        

System Architecture        

Package information        

Pinout diagram        

Module Terminal Functions Package dimensions        

Package dimensions        

Technical Specifications        

General Specification        

Electrical Characteristics        

Absolute Maximum Rating        

Recommended Operating Conditions        

Power Consumption        

Reference Design        

Related recommended        

Typical solder reflow profile        

Document history        

 

 

 

 

 

 

 

 

 

 

 

 

 

l                      Dual-mode Bluetooth low energy radio

l                      Support for Bluetooth basic rate / EDR and low energy connections

l                      3 Bluetooth low energy connections at the same time as basic rate A2DP

Bluetooth Radio

l                      On-chip balun (50Ω impedance in TX and RX modes)

l                      No external trimming is required in production

l                      Bluetooth v5.0 specification software/hardware

Bluetooth Transmitter

l                      Typical RF transmit power

l                      Basic rate 10 dBm

l                      EDR -1 dB (relative power)

l                      Bluetooth low energy 9 dBm

l                      6-bit DAC level control

l                      Class 1, Class 2 and Class 3 support without the need for an external power amplifier or TX/RX switch

Bluetooth Receiver

l                      Typical RF receiver sensitivity:

l                      Basic rate -90 dBm

l                      EDR -92 dBm

l                      Bluetooth low energy -93 dBm

l                      Integrated channel filters

l                      Digital demodulator for improved sensitivity and co-channel rejection

l                      Real-time digitized RSSI available to application

l                      Fast AGC for enhanced dynamic range

l                      Channel classification for AFH

Bluetooth Synthesizer

l                      Fully integrated synthesizer requires no external VCO, varactor diode, resonator or loop filter

Bluetooth low energy

Kalimba DSP

l                      Enhanced Kalimba 5 DSP coprocessor

l                      120 MHz clock, up to 120 MIPS performance

l                      24-bit fixed-point core

l                      Single-cycle MAC:

Audio Interface

l                      Audio codec with 2 high-quality dedicated ADCs

l                      24-bit audio processing support

l                      2 microphone bias generators and up to 2 analogue microphone inputs

l                      Up to 6 digital microphone inputs (MEMS)

l                      G.722 compatible, includes improved digital IIR filter path for stop-band attenuation required for G.722 compliance

l                      Enhanced side-tone gain control

l                      Supported sample rates of 8, 11.025, 16, 22.05, 32, 44.1, 48, 96 kHz and 192kHz (DAC only)

Physical Interface

l                      UART interface

l                      USB 2.0 interface (full)speed)

l                      Master and slave bit-serialize (I²C and SPI)

l                      Up to 32 PIOs (includes 12 general purpose PIOs and unused digital interfaces also available as PIOs)

l                      SPI debug and programming interface with read access disable locking

l                      2 x PCM/I²S and 1 x SPDIF supported simultaneously

l                      Dual/quad external serial flash memory interface

l                      3 LED drivers (includes RGB) with PWM flasher on sleep clock

l                      Support for up to 6 capacitive touch sensor inputs

l                      2 analogue PIOs

 

Integrated Power Control

l                      2 high-efficiency switch-mode regulators with 1.8 V and 1.35 V outputs from battery supply

l                      3.3 V USB pad supply linear regulator

l                      Low-voltage linear regulator for internal digital supply

l                      Low-voltage linear regulator for internal analogue supply with 1.35 V output

l                      Power-on-reset detects low supply voltage

l                      Power management includes digital shutdown and wake-up commands with low-power crystal drive for ultra-low power Park/Sniff/Hold mode

Battery Charger

l                      Lithium ion / Lithium polymer battery charger with instant-on

l                      Fast charging supports up to 200 mA with no external components

l                      Higher charge currents using external pass device

l                      Supports USB BCv1.2 CDP, DCP and SDP charger detection

l                      Charger pre-calibrated by CSR

Device Details 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

System Architecture

img1

 

Package information

        BM8670 and BM8675 modules is available a 17 x 15 x 2.74 mm 50-lead package

Pinout diagram

img2

Module Terminal Functions Package dimensions

Radio

Lead

Pad type

Description

RF

45

RF

Connect to the antenna

USB

Lead

Pad type

Description

USB_DP

24

Bidirectional

USB data plus with selectable internal 1.5kΩ pull-up resistor

USB_DN

25

USB data minus

UART

Lead

Pad type

Description

UART_RX

9

Bidirectional with strong pull-up

UART data input

UART_TX

10

Bidirectional with weak pull-up

UART data output

SPI Interface

Lead

Pad type

Description

SPI_CLK

4

Input with weak pull-down

Debug SPI clock

SPI_MOSI

5

Input with weak pull-down

Debug SPI data output

SPI_MISO

7

Output with weak pull-down

Debug SPI data input

SPI_CSB

8

Input with strong pull-up

chip select for debug SPI

PIO Port

Lead

Pad type

Description

AIO[0]

48

Bidirectional

Analog programmable input / output line

AIO[1]

49

PIO[0]

15

Bidirectional with weak pull-down

Programmable input/output line

PIO[1]

16

PIO[2]

17

PIO[3]

18

PIO[4]

19

Bidirectional with weak pull-down

Programmable input/output line 4

PCM2_IN: synchronous data input

I2S2_SD_IN: I2S data input

PIO[5]

20

Programmable input/output line 5

PCM2_OUT: synchronous data output

I2S2_SD_OUT: I2S data output

PIO[6]

21

Programmable input/output line 6

PCM2_SYNC: synchronous data sync.

I2S2_WS: I2S word select

PIO[7]

22

Programmable input/output line 7 

PCM2_CLK: synchronous data clock.

I2S2_CK: I2S clock

PIO[17]

50

Bidirectional with weak pull-down

Programmable input/output line 17 

PCM1_IN: synchronous data input

I2S1_SD_IN: I2S data input

PIO[18]

3

Programmable input/output line 18 

PCM1_OUT: synchronous data output

I2S1_SD_OUT: I2S data output

PIO[19]

2

Programmable input/output line 19

PCM1_SYNC: synchronous data sync.

I2S1_WS: I2S word select

PIO[20]

1

Programmable input/output line 20 

PCM1_CLK: synchronous data clock.

I2S1_CK: I2S clock

Note: only BM8675 support PCM2 and I2S2 interface

Test and debug

Lead

Pad type

Description

RST#

6

Input with strong pull up

Reset if low. Pull low for minimum 5 ms to cause a reset

Codec

Lead

Pad type

Description

SPKR_RP

44

Analog out

Speaker output positive, right

SPKR_RN

43

Speaker output negative, right

SPKR_LP

42

Speaker output positive, left

SPKR_LN

41

Speaker output negative, left

MIC_BIAS_B

40

Analog in

Microphone bias B

MIC_BIAS_A

39

Microphone bias A

MIC_LP

38

Microphone input positive, left, channel A

MIC_LN

37

Microphone input negative, left channel A

MIC_RP

36

Microphone input positive, right, channel B

MIC_RN

35

microphone input negative, right, channel B

 

 

 

 

LED drivers

Lead

Pad type

Description

LED[0]

12

Bidirectional

Open-drain output

LED[1]

13

LED[2]

14

Power supplies and control

Lead

Description

VBAT

27

Battery positive terminal

PWR (VREGENABLE)

28

Regulator enable and multifunction button. A high input (tolerant to VBAT voltages) enables the on-chip regulators, which can then be latched on internally and the button used as a multifunction input

VBAT_SENSE

39

Battery charger sense input

CHG_EXT

30

External battery charger transistor base control when using external charger boost. Otherwise leave unconnected

VCHARGE

31

Charger input, typically connected to USB VBUS

VDD_PADS

32

1.7V to 3.6V positive supply input for all input/output ports.

VOUT_1V8

33

1.8V by pass linear regulator output.

3V3USB

34

3.3V by pass linear regulator output

GND

11, 23, 26, 45, 47

Ground connections

 

Package dimensions

img3

Technical Specifications

General Specification

Items

Description

Bluetooth Standard

Bluetooth v5.0 Specification support

Bluetooth Audio

Bluetooth Low Energy secure connection

Chipset

Qualcomm CSR8670 / CSR8675

Dimension

17 x 15 x 2mm

Voltage

3V0~4V2

Temperature

-40+85

Storage Temperature

-40+105

Frequency Range

24022480MHz

Maximum RF Transmit Power

10dBm

Receive Sensitivity

-90dBm (basic rate) and -92dBm(EDR)

Bluetooth® Profile Supported

A2DP, AVRCP, HFP, HSP, SPP, DID, HOGP, PXP, FMP, BAS

All the profile version followed the ADK

 

Electrical Characteristics

Absolute Maximum Rating

Rating

Minimum

Maximum

Storage temperature

-40

+105

Supply voltage

 

4.2V

Recommended Operating Conditions

Operating Condition

Minimum

Maximum

Operating temperature range

-40

+85

Supply voltage: VBAT

+3.0V

+4.2V

Power Consumption

 

Item

Min

Type

Max

Unit

Note

State

Working voltage

 

3.3

 

V

 

Working current

 

5

15~19

 

mA

Low Energy

Call and Music

Standby current

 

5

800

 

uA

Low Energy

Call and Music

Power supply: 3.3V

Reference Design

Update Later

Related recommended

l                      Module output audio is differential signal

l                      If you want to use the MIC function, order to achieved the best sound effects, please don’t tack MIC and SPK is placed in the same plane, preferably vertically placed.

l                      Full metal shell will greatly shorten the Bluetooth transmission distance

l                      Bluetooth antenna below PCB plate not copper

 

Typical solder reflow profile

The module must go through 125C baking for at least 9 hours before SMT AND IR reflow process

img4

 

Document history

Version

Data

History

1.0

April 18, 2018

The First Release Version

1.1

May 20, 2018

Power Consumption Details

 

 

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