REV. B

AD1981B

–19–

AC ’97 2.2 AMAP Compliant Default SPDIF Slot Assignments

Codec ID

Function

SPSA = 00

SPSA = 01

SPSA = 10

SPSA = 11

00

2-Ch Primary w/SPDIF

3 and 4

7 and 8 (default)

6 and 9

10 and 11

00

4-Ch Primary w/SPDIF

3 and 4

7 and 8

6 and 9 (default)

10 and 11

00

6-Ch Primary w/SPDIF

3 and 4

7 and 8

6 and 9

10 and 11 (default)

01

+2-Ch Secondary w/SPDIF

3 and 4

7 and 8

6 and 9 (default)

01

+4-Ch Secondary w/SPDIF

3 and 4

7 and 8

6 and 9

10 and 11 (default)

10

+2-Ch Secondary w/SPDIF

3 and 4

7 and 8

6 and 9 (default)

10

+4-Ch Secondary w/SPDIF

3 and 4

7 and 8

6 and 9

10 and 11 (default)

11

+2-Ch Secondary w/SPDIF

3 and 4

7 and 8

6 and 9

10 and 11 (default)

SR[15:0]

Sample Rate. The sampling frequency range is from 7 kHz (1B58h) to 48 kHz (BB80h) in 1 Hz increments.

If 0 is written to VRA, the sample rate is reset to 48k.

SR[15:0]

Sample Rate. The sampling frequency range is from 7 kHz (1B58h) to 48 kHz (BB80h) in 1 Hz increments.

If 0 is written to VRA, the sample rate is reset to 48k.

PCM Front DAC Rate Register (Index 2Ch)

Reg

No. Name

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

Default

2Ch PCM Front

SRF15 SRF14 SRF13 SRF12 SRF11 SRF10 SRF9 SRF8 SRF7 SRF6 SRF5 SRF4 SRF3 SRF2 SRF1 SRF0 BB80h

DAC Rate

This read/write sample rate control register contains a 16-bit unsigned value, representing the rate of operation in Hz.

PCM ADC Rate Register (Index 32h)

Reg

No. Name

D15

D14

D13

D12

D11

D10

D9

D8

D7

D6

D5

D4

D3

D2

D1

D0

Default

32h

PCM L/R

SRA15 SRA14 SRA13 SRA12 SRA11 SRA10 SRA9 SRA8 SRA7 SRA6 SRA5 SRA4 SRA3 SRA2 SRA1 SRA0 BB80h

ADC Rate

This read/write sample rate control register contains 16-bit unsigned value, representing the rate of operation in Hz.