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Revision 1.5, October 11, 2002
21
Data Sheet
VT1616 6-Channel AC97 Codec with S/PDIF
PCM Front and Center DAC Sample Rate Register (Index 2Ch)
SR[15:0]
Main stereo + Center or all DAC Sample Rate (in Hz)
16-bit unsignedvalue representing the sample rate in 1Hz resolution. The default value is 48 KHz
(48000 = BB80h). This register controls all six DAC output rate providing a sample accurate
synchronization among the channels. Registers 2Eh and30h are read/writable but have no control
over the SurroundandLFE channels. They reflect 2Ch when readback.
PCM Surround DAC Sample Rate Register (Index 2Eh)
SR[15:0]
Surround DAC Sample Rate (in Hz)
16-bit unsignedalias value of 2Ch representing the sample rate in 1Hz resolution. The default value
is 48 KHz (48000 = BB80h). This register has no physical control over the Surroundpair DACs
sampling rate.
PCM LFE DAC Sample Rate Register (Index 30h)
SR[15:0]
LFE DAC Sample Rate (in Hz)
16-bit unsignedalias value of 2Ch representing the sample rate in 1Hz resolution. The default value
is 48 KHz (48000 = BB80h). This register has no physical control over the LFE DAC’s sampling
rate.
PCM ADC Sample Rate Register (Index 32h)
SR[15:0]
ADC Sample Rate (in Hz)
16-bit unsignedvalue representing the sample rate in 1Hz resolution. The default value is 48 KHz
(48000 = BB80h).
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Default
SR15 SR14 SR13 SR12 SR11
SR10
SR9
SR8
SR7
SR6
SR5
SR4
SR3
SR2
SR1
SR0
BB80h
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Default
SR15 SR14 SR13 SR12 SR11
SR10
SR9
SR8
SR7
SR6
SR5
SR4
SR3
SR2
SR1
SR0
BB80h
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Default
SR15 SR14 SR13 SR12 SR11
SR10
SR9
SR8
SR7
SR6
SR5
SR4
SR3
SR2
SR1
SR0
BB80h
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Default
SR15 SR14 SR13 SR12 SR11
SR10
SR9
SR8
SR7
SR6
SR5
SR4
SR3
SR2
SR1
SR0
BB80h
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