CSR8635 View Datasheet(PDF) - CSR plc

Part Name

Description

Manufacturer

CSR8635

The CSR8635 QFN single-chip Bluetooth® audio ROM device targets mid-range stereo speakers and headsets.

CSR plc 

PIO Port

Lead Pad Type

Supply Domain

Description

PIO[4]

24

Bidirectional with weak

pull-down

VDD_PADS_1

Programmable input / output line 4.

Alternative function:

■ SPI_CS#: chip select for SPI, active

low

■ PCM1_SYNC: PCM1 synchronous

data sync

Programmable input / output line 3.

PIO[3]

28

Bidirectional with weak

pull-down

VDD_PADS_1

Alternative function:

■ SPI_MISO: SPI data output

er 27, 2013 PIO[2]

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Prepared AU_REF

30

Bidirectional with weak

pull-down

VDD_PADS_1

60

Bidirectional with strong

pull-up

VDD_PADS_2

59

Bidirectional with strong

pull-up

VDD_PADS_2

20 Bidirectional

VDD_AUX

Lead Pad Type

Supply Domain

35 Input with strong pull-up VDD_PADS_1

Lead Pad Type

2

Analogue in

1

Supply Domain

VDD_AUDIO

■ PCM1_OUT: PCM1 synchronous

data output

Programmable input / output line 2.

Alternative function:

■ SPI_MOSI: SPI data input

■ PCM1_IN: PCM1 synchronous data

input

Programmable input / output line 1.

Alternative function:

■ UART_TX: UART data output

Programmable input / output line 0.

Alternative function:

■ UART_RX: UART data input

Analogue programmable input / output

line 0.

Description

Reset if low. Pull low for minimum 5ms to

cause a reset.

Description

Microphone bias

Decoupling of audio reference (for high-

quality audio)

SPKR_RN

SPKR_RP

6

Analogue out

7

VDD_AUDIO_DRV

Speaker output negative, right

Speaker output positive, right

Production Information

© Cambridge Silicon Radio Limited 2013

Confidential Information - This Material is Subject to CSR's Non-disclosure Agreement

Page 16 of 105

CS-303725-DSP5

www.csr.com

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