STAC9758 Datasheet, PDF (82/119 Pages) Integrated Device Technology – HIGH-PERFORMANCE 6-CHANNEL AC’97 2.3 CODEC WITH UNIVERSAL JACKS

STAC9758/9759
HIGH-PERFORMANCE 6-CHANNEL AC’97 2.3 CODEC WITH UNIVERSAL JACKS™
PC AUDIO
8.4.4. Extended Modem Status and Control Register (3Eh)
Default: 0100h
D15
D14
D13
D12
D11
D10
D9
RESERVED
D7
D6
D5
D4
D3
D2
D1
RESERVED
Bit(s)
Reset Value
R/W
Name
Description
15:9
0
RO
RESERVED Bit not used, should read back 0
8
1
RW
PRA
0 = GPIO powered up / enabled
1 = GPIO powered down / disabled
7:1
0
RO
RESERVED Bit not used, should read back 0
0 = GPIO not ready (powered down)
0
0
RO
GPIO
1 = GPIO ready (powered up)
(This is just bit D8 inverted)
D8
PRA
D0
GPIO
8.4.5. GPIO Pin Configuration Register (4Ch)
Default: 000Fh
D15
D14
D13
D12
D11
RESERVED
D7
D6
D5
D4
D3
RESERVED
GC3
(GPIO3)
D10
D2
GC2
(GPIO2)
D9
D1
GC1
(GPIO1)
Bit(s)
Reset Value
R/W
Name
Description
15:4
0
RO
RESERVED Bit not used, should read back 0
3
1
RW
GC3
0 = GPIO3 configured as output
1 = GPIO3 configured as input
2
1
RW
GC2
0 = GPIO2 configured as output
1 = GPIO2 configured as input
1
1
RW
GC1
0 = GPIO1 configured as output
1 = GPIO1 configured as input
0
1
RW
GC0
0 = GPIO0 configured as output
1 = GPIO0 configured as input
D8
D0
GC0
(GPIO0)
IDT™
82
HIGH-PERFORMANCE 6-CHANNEL AC’97 2.3 CODEC WITH UNIVERSAL JACKS™
STAC9758/9759
V 1.2 1206