STAC9766 Datasheet, PDF (58/97 Pages) Integrated Device Technology – 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
PC AUDIO
Bit(s) Reset Value Access
Name
Description
10:4
0
Read Only RESERVED Bits not used, should read back 0
Page Selector
0h = Vendor Specific
1h = Page ID 01 (See Section 8.4 for additional information on the
Paging Registers)
Fh = Reserved Pages
This register is used to select a descriptor of 16 word pages
3:0
0
Read / Write
PG3:PG0
between registers 60h to 6Fh. Value 0h is used to select vendor
specific space to maintain compatibility with AC’97 2.2 vendor
specific registers.
System software determines implemented pages by writing the
page number and reading the value back. All implemented pages
must be consecutive. (i.e., page 2h cannot be implemented without
page 1h).
These registers are not reset on RESET#.
8.1.18. Powerdown Ctrl/Stat (26h)
Default: 000Fh
D15
EAPD
D7
D14
D13
PR6
PR5
D6
D5
RESERVED
Bit(s) Reset Value
Name
15
0
EAPD
14
0
PR6
13
0
PR5
12
0
PR4
11
0
PR3
10
0
9
0
8
0
7:4
0
3
1
2
1
PR2
PR1
PR0
RESERVED
REF
ANL
D12
D11
D10
D9
D8
PR4
PR3
PR2
PR1
PR0
D4
D3
D2
D1
D0
REF
ANL
DAC
ADC
Description
1 = Forces EAPD pad to VDDD
0 = Forces EAPD pad to GNDD
0 = Headphone Amp powered up
1 = Headphone Amp powered down
0 = Digital Clk active
1 = Digital Clk disable
0 = Digital active
1 = Powerdown: PLL, AC-Link, crystal oscillator
0 = VREF and VREFOUT are active
1 = VREF and VREFOUT are powered down, and PR2 is asserted in
analog block
0 = Analog active
1 = All signal path analog is powered down
0 = DAC powered up
1 = DAC powered down
0 = ADC powered up
1 = ADC powered down
Bit not used, should read back 0
Read Only --- VREF status
1 = VREF enabled
Read Only ---- ANALOG MIXERS, etc. Status
1 = Analog mixers ready.
IDT™
58
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH STEREO MICROPHONE AND MIC/JACK SENSING
STAC9766/9767
V 7.4 12/06