AD1981BL Analog Devices, AD1981BL Datasheet - Page 20

• Manufacturer Part Number: AD1981BL
• Description: Low Voltage AC'97 Soundmax Codec
• Manufacturer: Analog Devices

AD1981BL
Codec ID
00
00
00
01
01
10
10
11
This read/write sample rate control register contains a 16-bit unsigned value, representing the rate of operation in Hz.
SRF[15:0]
This read/write sample rate control register contains 16-bit unsigned value, representing the rate of operation in Hz.
SRA[15:0]
Reg
No. Name
2Ch PCM Front
Reg
No. Name
32h PCM L/R
DAC Rate
ADC Rate
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 48 kHz.
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 48 kHz.
Function
2-Ch Primary w/SPDIF
4-Ch Primary w/SPDIF
6-Ch Primary w/SPDIF
+2-Ch Secondary w/SPDIF
+4-Ch Secondary w/SPDIF
+2-Ch Secondary w/SPDIF
+4-Ch Secondary w/SPDIF
+2-Ch Secondary w/SPDIF
D15
SRF15 SRF14 SRF13 SRF12 SRF11 SRF10 SRF9 SRF8 SRF7 SRF6 SRF5 SRF4 SRF3 SRF2 SRF1 SRF0 BB80h
D15
SRA15 SRA14 SRA13 SRA12 SRA11 SRA10 SRA9 SRA8 SRA7 SRA6 SRA5 SRA4 SRA3 SRA2 SRA1 SRA0 BB80h
D14
D14
D13
D13
AC ’97 2.2 AMAP Compliant Default SPDIF Slot Assignments
D12
D12
PCM Front DAC Rate Register (Index 2Ch)
D11
D11
PCM ADC Rate Register (Index 32h)
SPSA = 00
3 and 4
3 and 4
3 and 4
3 and 4
3 and 4
3 and 4
3 and 4
3 and 4
D10
D10
D9
D9
–20–
D8
D8
SPSA = 01
7 and 8 (default)
7 and 8
7 and 8
7 and 8
7 and 8
7 and 8
7 and 8
7 and 8
D7
D7
D6
D6
D5
D5
SPSA = 10
6 and 9
6 and 9 (default)
6 and 9
6 and 9 (default)
6 and 9
6 and 9 (default)
6 and 9
6 and 9
D4
D4
D3
D3
D2
D2
D1
D1
SPSA = 11
10 and 11
10 and 11
10 and 11 (default)
10 and 11 (default)
10 and 11 (default)
10 and 11 (default)
D0
D0
Default
Default
REV. 0