CS8401 datasheet(16/34 Pages) ETC

16 / 34 page

PIN DESCRIPTIONS

Power Supply Connections

VD+ - Positive Digital Power, PIN 19.

Positive supply for the digital section. Nominally +5 volts.

GND - Ground, PIN 18.

Ground for the digital section.

Audio Input Interface

SCK - Serial Clock, PIN 6.

Serial clock for SDATA pin which can be configured (via control register 3) as an input or

output, and can sample data on the rising or falling edge. As an output, SCK will contain 32

clocks for every audio sample. As an input, it does not need to be continuous and can be up to

15 MHz.

FSYNC - Frame Sync, PIN 7.

Delineates the serial data and may indicate the particular channel, left or right. Also, FSYNC

may be configured as an input or output. The format is based on bits in control register 3.

SDATA - Serial Data, PIN 8.

Audio data serial input pin.

Parallel Interface

CS - Chip Select, PIN 14.

This input is active low and allows access to the 32 bytes of internal memory. The address bus

and RD/WR must be valid while CS is low.

CS8401A

DATA BUS BIT 4

DATA BUS BIT 3

DATA BUS BIT 5

DATA BUS BIT 2

DATA BUS BIT 6

DATA BUS BIT 1

DATA BUS BIT 7

DATA BUS BIT 0

MASTER CLOCK

MCK

TXP

TRANSMIT POSITIVE

SERIAL DATA CLOCK

SCK

VD+

POWER

FRAME SYNC

FSYNC

GND

GROUND

SERIAL INPUT DATA

SDATA

TXN

TRANSMIT NEGATIVE

ADDRESS BUS BIT 4

RD/WR

READ/WRITE SELECT

ADDRESS BUS BIT 3

INT

INTERRUPT

ADDRESS BUS BIT 2

CHIP SELECT

ADDRESS BUS BIT 1

ADDRESS BUS BIT 0

CS8401A

DS60F1

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