STAC9721 Datasheet, PDF (21/48 Pages) List of Unclassifed Manufacturers – Stereo AC 97 Codec With Multi-Codec Option

SigmaTel, Inc.
Data Sheet
STAC9721
4.4 Programming Registers:
Table 7. Programming Registers
REG
#
00h
NAME
Reset
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
X SE4 SE3 SE2 SE1 SE0 ID9 ID8 ID7 ID6 ID5 ID4 ID3 ID2 ID1 ID0
DE-
FAULT
6940h
02h
Master Volume
Mute X X ML4 ML3 ML2 ML1 ML0 X X X MR4 MR3 MR2 MR1 MR0 8000h
04h
LNLVL Volume
Mute X X GL4 GL3 GL2 GL1 GL0 X X X GR4 GR3 GR2 GR1 GR0 8000h
06h Master Volume Mono Mute X X X X X X X X X X MM4 MM3 MM2 MM1 MM0 8000h
0Ah PC_BEEP Volume Mute X X X X X X X X X X PV3 PV2 PV1 PV0 X
0000h
0Ch
Phone Volume
Mute X X X X X X X X X X GN4 GN3 GN2 GN1 GN0 8008h
0Eh
Mic Volume
Mute X X X X X X X X 20dB X GN4 GN3 GN2 GN1 GN0 8008h
10h
Line In Volume
Mute X X GL4 GL3 GL2 GL1 GL0 X X X GR4 GR3 GR2 GR1 GR0 8808h
12h
CD Volume
Mute X X GL4 GL3 GL2 GL1 GL0 X X X GR4 GR3 GR2 GR1 GR0 8808h
14h
Video Volume
Mute X X GL4 GL3 GL2 GL1 GL0 X X X GR4 GR3 GR2 GR1 GR0 8808h
16h
AUX Volume
Mute X X GL4 GL3 GL2 GL1 GL0 X X X GR4 GR3 GR2 GR1 GR0 8808h
18h
PCM Out Volume Mute X X GL4 GL3 GL2 GL1 GL0 X X X GR4 GR3 GR2 GR1 GR0 8808h
1Ah
Record Select
X X X X X SL2 SL1 SL0 X X X X X SR2 SR1 SR0 0000h
1Ch
Record Gain
Mute X X X GL3 GL2 GL1 GL0 X X X X GR3 GR2 GR1 GR0 8000h
20h
General Purpose
X X 3D X X X MIX MS LPBK X X X X X X X
0000h
22h
3D Control
X X X X X X X X X X X X DP3 DP2 X X
0000h
26h Powerdown Ctrl/Stat EAPD PR6 PR5 PR4 PR3 PR2 PR1 PR0 X X X X REF ANL DAC ADC 000Fh
28h Extended Audio ID ID1 ID0 X X X X AMAP X X X X X X X X X
0200h
6Ch
Revision Code
0000000000000000
0000h
6Eh
Analog Special
X X X X X X X X X X X X X X DAC ADC 0000h
-6dB -6dB
70h
72h Enable
EN15 EN14 EN13 EN12 EN11 EN10 EN9 EN8 EN7 EN6 EN5 EN4 EN3 EN2 EN1 EN0 0000h
72h Analog Current Adjust X X X X X X X X X X X X X Bias1 Bias0 X
0000h
74h Multi-Channel Selection X X X X X X X X X X X X X X MC1 MC0 0000h
76h
78h Enable
EN15 EN14 EN13 EN12 EN11 EN10 EN9 EN8 EN7 EN6 EN5 EN4 EN3 EN2 EN1 EN0 0000h
78h
Clock Access
7Ch
Vendor ID1
X X ALT PWD CLK X X X X X X X X X OSC X
CLK _{CL2x INV}
PWD
1000001110000100
0000h
8384h
7Eh
Vendor ID2
0111011000001001
7609h
Notes:
1. All registers not shown and bits containing an X are reserved.
2. Any reserved bits, marked X, are not writable, and read back as zeros.
3. PC_BEEP default to 0000h, un-muted.
4. If optional bits D13, D5 of register 02h or D5 of register 06h are set to 1, then the corresponding attenuation is set to 46dB and the register
reads will produce 1Fh as a value for this attenuation/gain block.
21
04/07/00
04/07/00