STAC9766 Datasheet, PDF (66/97 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
8.2.4. Extended Modem Status and Control Register (3Eh)
Default: 0100h
D15
D14
D13
D7
D6
D5
Bit(s)
15:9
8
7:1
0
Access Reset Value
Read Only
0
Read / Write
1
Read Only
0
Read Only
0
D12
D11
D10
D9
RESERVED
D4
D3
D2
D1
RESERVED
Name
RESERVED
PRA
RESERVED
GPIO
Description
Bit not used, should read back 0
0 = GPIO powered up / enabled
1 = GPIO powered down / disabled
Bit not used, should read back 0
0 = GPIO not ready (powered down)
1 = GPIO ready (powered up)
8.2.5. GPIO Pin Configuration Register (4Ch)
Default: 0003h
D15
D14
D7
D6
D13
D12
D11
RESERVED
D5
D4
D3
RESERVED
D10
D9
D2
D1
GC1
(GPIO1)
Bit(s)
15:2
1
Access Reset Value
Read Only
0
Read / Write
1
0
Read / Write
1
Name
RESERVED
GC1
GC0
Description
Bit not used, should read back 0
0 = GPIO1 configured as output
1 = GPIO1 configured as input
0 = GPIO0 configured as output
1 = GPIO0 configured as input
D8
PRA
D0
GPIO
D8
D0
GC0
(GPIO0)
8.2.6. GPIO Pin Polarity/Type Register (4Eh)
Default: FFFFh
D15
D14
D7
D6
D13
D12
D11
RESERVED
D5
D4
D3
RESERVED
D10
D9
D8
D2
D1
D0
GP1
(GPIO1)
GP0
(GPIO0)
Bit(s) Access Reset Value
15:2 Read Only
0
1 Read / Write
1
0 Read / Write
1
Name
Description
RESERVED Bit not used, should read back 0
GP1
0 = GPIO1 Input Polarity Inverted, CMOS output drive.
1 = GPIO1 Input Polarity Non-inverted, Open-Drain output drive.
GP0
0 = GPIO0 Input Polarity Inverted, CMOS output drive.
1 = GPIO0 Input Polarity Non-inverted, Open-Drain output drive.
IDT™
66
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH STEREO MICROPHONE AND MIC/JACK SENSING
STAC9766/9767
V 7.4 12/06