CS5530 datasheet(33/241 Pages) NSC

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Signal Definitions (Continued)

GPIO1/

SDATA_IN2

AE24

I/O

5VT

General Purpose I/O 1 or Serial Data Input 2

This pin can function either as a general purpose I/O or as a second serial

data input pin if two codecs are used in the system.

In order for this pin to function as SDATA_IN2, it must first be configured

as an input (F0 Index 90h[1] = 0). Then setting F3BAR+Memory Offset

08h[21] = 1 selects the pin to function as SDATA_IN2.

Refer to GPIO[3:2] signal description for GPIO function description.

GPIO0

AC22

I/O

5VT

General Purpose I/O 0

Refer to GPIO[3:2] signal description for GPIO function description.

2.2.9

Game Port and General Purpose I/O Interface (Continued)

Signal Name

No.

Type

Description

2.2.10 Audio Interface

Signal Name

No.

Type

Description

BIT_CLK

5VT

Audio Bit Clock

The serial bit clock from the codec.

SDATA_OUT

Serial Data I/O

This output transmits audio serial data to the codec.

SDATA_IN

5VT

Serial Data Input

This input receives serial data from the codec.

SYNC

Serial Bus Synchronization

This bit is asserted to synchronize the transfer of data between the

CS5530 and the AC97 codec

PC_BEEP

PC Beep

Legacy PC/AT speaker output.

CS5530 数据表(PDF) 33 Page - National Semiconductor (TI)

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