STAC9766 IDT [Integrated Device Technology], STAC9766 Datasheet - Page 63

• Manufacturer Part Number: STAC9766
• Manufacturer: IDT [Integrated Device Technology]

IDT™
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH STEREO MICROPHONE AND MIC/JACK SENSING
STAC9766/9767
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH STEREO MICROPHONE AND MIC/JACK SENSING
8.1.21.
8.1.22.
8.1.23.
SR15
SR15
SR7
SR7
D15
D15
D7
D7
PCM DAC Rate Registers (2Ch and 32h)
The internal sample rate for the DACs and ADCs is controlled by the value in these read/write regis-
ters that contain a 16-bit unsigned value between 0 and 65535 representing the conversion rate in
Hertz (Hz). In VRA mode (register 2Ah bit D0 = 1), if the value written to these registers is supported,
that value will be echoed back when read, otherwise the closest (higher in the case of a tie) sample
rate is supported and returned. Per PC 99 / PC 2001 specification, independent sample rates are
supported for record and playback.
Whenever VRA is set to 0 , the PCM rate registers (2Ch and 32h) will be loaded with BB80h
(48 KHz).
If VRA is set to a 0, any write to this address will be ignored and the rate remains at 48 KHz.
PCM DAC Rate (2Ch)
Default: BB80h (see table22: page63)
PCM LR ADC Rate (32h)
Default: BB80h (see table22: page63)
SR14
SR14
D14
SR6
D14
SR6
D6
D6
Sample Rate
11.025 KHz
22.05 KHz
44.1 KHz
16 KHz
32 KHz
48 KHz
8 KHz
SR13
SR13
SR5
SR5
D13
D13
D5
D5
Table 22. Hardware Supported Sample Rates
SR12
SR12
SR4
SR4
D12
D12
63
D4
D4
SR11
SR11
SR3
SR3
D11
D11
D3
D3
STAC9766/9767
SR10
SR10
D10
SR2
D10
SR2
D2
D2
SR15-SR0 Value
AC44h
BB80h
1F40h
2B11h
3E80h
7D00h
5622h
SR9
SR1
SR9
SR1
D9
D1
D9
D1
PC AUDIO
V 7.4 12/06
SR8
SR0
SR8
SR0
D8
D0
D8
D0