CS8422-DNZR View Datasheet(PDF) - Cirrus Logic

Part Name

Description

MFG CO.

CS8422-DNZR

24-bit, 192-kHz, Asynchronous Sample Rate Converter with Integrated Digital Audio Interface Receiver

Cirrus Logic 

1. PIN DESCRIPTION

1.1 Software Mode

CS8422

RX0/RXP0 1

RX1/RXN0 2

VA 3

AGND 4

RX2/RXP1 5

RX3/RXN1 6

AD0/CS 7

AD1/CDIN 8

32 31 30 29 28 27 26 25

Thermal Pad

Top-Down View

32-Pin QFN Package

24 OSCLK2

23 SDOUT2

22 VL

21 DGND

20 VD_FILT

19 V_REG

18 GPO2

17 GPO1

9 10 11 12 13 14 15 16

Pin Name

RX[3:0],

RXP/RXN[1:0]

VA

AGND

AD0/CS

AD1/CDIN

SCL/CCLK

SDA/CDOUT

Pin #

1

2

5

6

3

4

7

8

9

10

Pin Description

AES3/SPDIF Input (Input) - Single-ended or differential receiver inputs carrying AES3 or S/PDIF

encoded digital data. RX[3:0] comprise the single-ended input multiplexer. RXP[1:0] comprise the

non-inverting inputs of the differential input multiplexer and RXN[1:0] comprise the inverting inputs

of the differential input multiplexer. Unused inputs should be tied to AGND/DGND.

Analog Power (Input) - Analog power supply, nominally +3.3 V. Care should be taken to ensure

that this supply is as noise-free as possible, as noise on this pin will directly affect the jitter perfor-

mance of the recovered clock.

Analog Ground (Input) - Ground for the analog circuitry in the chip. AGND and DGND should be

connected to a common ground area under the chip.

Address Bit 0 (I²C) / Software Chip Select (SPI) (Input) - A falling edge on this pin puts the

CS8422 into SPI Control Port Mode. With no falling edge, the CS8422 defaults to I²C Mode. In I²C

Mode, AD0 is a chip address pin. In SPI Mode, CS is used to enable the control port interface on

the CS8422. See “Control Port Description” on page 42.

Address Bit 1 (I²C) / Serial Control Data in (SPI) (Input) - In I²C Mode, AD1 is a chip address pin.

In SPI Mode, CDIN is the input data line to the control port interface. See “Control Port Description”

on page 42.

Software Clock (Input) - Serial control interface clock used to clock control data bits into and out of

the CS8422.

Serial Control Data I/O (I²C) / Data Out (SPI) (Input/Output) - In I²C Mode, SDA is the control I/O

data line. In SPI Mode, CDOUT is the output data from the control port interface on the CS8422.

DS692F1

9

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