AV2636

Product Datasheet

PROGRAMMABLE CONTROL REGISTER ASSIGNMENT

There are 4 programmable control registers in AV2636. Their function and address assignment are

described in the following tables. All the contents of the programmable control registers can be read back

through the serial control interface.

Address

(7-bit hex)

Register

Default Value

(hex)

Function Description

0

CREG0[7:0]

7F

Volume control for both left and right channel

1

CREG1[7:0]

00

Device control

2

CREG2[7:0]

00

Serial audio interface mode control

3

CREG3[7:0]

00

Clock and sample rate settings

Volume Control Register (CREG0[7:0])

CREG0[7:0]

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

Address

7’h00

VOLUME[7:0]

Default Value

0

1

1

1

1

1

1

1

Device Control Register (CREG1[7:0])

CREG1[7:0]

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

Address

7’h01

StdBy

DeEmp

Reserved

Mute

Default Value

0

0

0

0

0

0

0

0

StdBy: Stand-By Control

0: disable Stand-By (default)

1: enable Stand-By for power saving

(Notes: Mute should be enabled when StdBy is enabled.)

DeEmp: De-emphasis control

0: by-pass de-emphasis filter (default)

1: enable de-emphasis filter

Mute: Software mute control

0: do not mute the left and right channel DACs (default)

1: mute the left and right channel DACs simultaneously

Serial Audio Interface Control Register (CREG2[7:0])

CREG2[7:0]

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

Address

7’h02

Reserved

SFJ

SCJ

SAIM[1:0]

Format[1:0]

Default Value

0

0

0

0

0

0

0

0

SFJ: Sync Frame Adjustment

0: do not delay SF signal by 1 SC clock cycle (default)

1: delay SF signal by 1 SC clock cycle

SCJ: Serial Clock Adjustment

0: do not invert SC clock (default)

1: invert SC clock

AVS Technology, Inc.

10-16

August 18, 2004

www.avstech.com