AD1986_15 Datasheet, PDF (30/52 Pages) Analog Devices – AC 97 SoundMAX CODEC

AD1986
Preliminary Technical Data
SURROUND DAC PCM RATE (REGISTER 0x2E)
This read/write sample rate control register contains a 16-bit unsigned value, representing the rate of operation in Hz. If the VRA bit
(0x2A D00) is 0, this register is forced to 48 kHz (0xBB80). If VRA is 1, this register may be programmed with the actual sample rate.
If the DRA bit (0x2A D01) is set, the surround DAC is inoperative and automatically powered down.
Reg Name
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Default
0x2E SURR_1 DAC PCM R15 R14 R13 R12 R11 R10 R9 R8 R7 R6 R5 R4 R3 R2 R1 R0 0xBB80
Rate
Table 50.
Register Function
R [15:0]
(Sample
Rate)
The sampling frequency range is from 7 kHz (0x01B58) to 48 kHz (0xBB80) in 1 Hz increments. If zero is written to VRA then the
sample rates are reset to 48k.
C/LFE DAC PCM RATE (REGISTER 0x30)
This read/write sample rate control register contains a 16-bit unsigned value, representing the rate of operation in Hz. If the VRA bit
(0x2A D00) is 0 this register is forced to 48 kHz (0xBB80). If VRA is 1, this register may be programmed with the actual sample rate.
If the DRA bit (0x2A D01) is set, the C/LFE DAC is inoperative and automatically powered down.
Reg Name
0x30 C/LFE DAC
PCM Rate
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Default
R15 R14 R13 R12 R11 R10 R9 R8 R7 R6 R5 R4 R3 R2 R1 R0 0xBB80
Table 51.
Register Function
R [15:0]
(Sample
Rate)
The sampling frequency range is from 7 kHz (0x01B58) to 48 kHz (0xBB80) in 1 Hz increments. If 0 is written to VRA then the
sample rates are reset to 48k.
ADC PCM RATE (REGISTER 0x32)
This read/write sample rate control register contains 16-bit unsigned value, representing the rate of operation in Hz. If the VRA bit (0x2A
D00) is 0 (zero) this register is forced to 48 kHz (0xBB80). If VRA is 1, this register may be programmed with the actual sample rate.
Reg Name
0x32 ADC 0 PCM
Rate
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Default
R15 R14 R13 R12 R11 R10 R9 R8 R7 R6 R5 R4 R3 R2 R1 R0 0xBB80
Table 52.
Register Function
R [15:0]
(Sample
Rate)
The sampling frequency range is from 7 kHz (0x01B58) to 48 kHz (0xBB80) in 1 Hz increments. If 0 is written to VRA then the
sample rates are reset to 48k.
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