User Manual

CONFIDENTIAL

3. Hardware Architecture

Block Diagram

IS1657NM

16M XTAL

EEPROM

RTX

(Class 2)

I2C

32 mm

12.6 mm

UART/ HCI Interface

GPIO Control

Antenna

Power Tree

BM57 Module

IS1657NM

EEPROM

VDD_IO

Either One

BAT_IN is

recommended

BAT_IN_5V

BAT_IN

3V~4V2

BAT_IN_5V

BAT_IN

VDD_FIO

USB_VDD

LDO18_I

1V8

VDD_XO

VCC_RF

AVDD_SAR

1V8_U_P

LDO18_O

1V8

VDD_IO

LDO33_O

2V8 ~ 3V3

4. Compatibility Requirements

The BM57SPPSyC2 Bluetooth module shall pass the standard test plan, which includes hardware compatibility and

reliability, and software compatibility test.