BTM8645 datasheet(9/21 Pages) BUDDIES

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BTM8645 DATASHEET

3.1 Pin Description

Pin#

Pin Name

Pad Type

Description

MIC_AN

Analogue

Microphone input negative, left

MIC_AP

Analogue

Microphone input positive, left

MIC_BN

Analogue

Microphone input negative, right

MIC_BP

Analogue

Microphone input positive, right

MIC_BIAS

Analogue

Microphone bias

AIO[0]

Bi-directional

VDD/Low-voltage regulator output

Analogue programmable input/ output line

circuitry and 1.5V regulated output (from

internal low-voltage regulator)

Reset

CMOS input with weak internal

pull-up

Active LOW reset

+1V8

Power

High-voltage linear regulator output (1.8V

out)

+3V3-USB

Power Supply

Positive supply for BT Module(3.0V~3.6V)

UART_RX

CMOS input with weak internal

pull-down

UART data input

UART_RTS

Bi-directional CMOS output,

tri-state, with weak internal

pull-up

UART request to send active low

UART_TX

Bi-directional CMOS output,

tri-state, with weak internal

pull-up

UART data output

UART_CTS

CMOS input with weak internal

pull-down

UART clear to send active low

GND

Ground

Digital Ground

USB_DP

Bi-directional

USB data plus with selectable internal

1.5k

pull-up resistor

USB_DN

Bi-directional

USB data minus

LED_0

Open drain output

LED driver

LED_1

Open drain output

LED driver

LED_2

Open drain output

LED driver

SPI_EN

Input with weak internal pull-up

Chip select for Serial Peripheral Interface

(SPI),active low

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