STAC9758 Datasheet, PDF (83/119 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
8.4.6.
GPIO Pin Polarity/Type Register (4Eh)
Default: FFFFh
D15
D14
D13
D12
D11
RESERVED
D7
D6
D5
D4
D3
RESERVED
GP3
(GPIO3)
D10
D2
GP2
(GPIO2)
D9
D1
GP1
(GPIO1)
D8
D0
GP0
(GPIO0)
Bit(s)
15:4
3
2
1
0
Reset Value R/W
FFFh
RO
1
RW
1
RW
1
RW
1
RW
Name
RESERVED
GP3
GP2
GP1
GP0
Description
Bit not used, should read back 0
0 = GPIO3 Input Polarity Inverted, CMOS output drive.
1 = GPIO3 Input Polarity Non-inverted, Open-Drain output drive.
0 = GPIO2 Input Polarity Inverted, CMOS output drive.
1 = GPIO2 Input Polarity Non-inverted, Open-Drain output drive.
0 = GPIO1 Input Polarity Inverted, CMOS output drive.
1 = GPIO1 Input Polarity Non-inverted, Open-Drain output drive.
0 = GPIO0 Input Polarity Inverted, CMOS output drive.
1 = GPIO0 Input Polarity Non-inverted, Open-Drain output drive.
8.4.7. GPIO Pin Sticky Register (50h)
Default: 0000h
D15
D14
D13
D12
D11
D10
D9
RESERVED
D7
D6
D5
D4
D3
D2
D1
RESERVED
GS3
(GPIO3)
GS2
(GPIO2)
GS1
(GPIO1)
Bit(s) Reset Value R/W
Name
Description
15:4
0
RO RESERVED Bit not used, should read back 0
3
0
RW
GS3
0 = GPIO3 Non-sticky configuration.
1 = GPIO3 Sticky configuration.
2
0
RW
GS2
0 = GPIO2 Non-sticky configuration.
1 = GPIO2 Sticky configuration.
1
0
RW
GS1
0 = GPIO1 Non-sticky configuration.
1 = GPIO1 Sticky configuration.
0
0
RW
GS0
0 = GPIO0 Non-sticky configuration.
1 = GPIO0 Sticky configuration.
D8
D0
GS0
(GPIO0)
IDT™
83
HIGH-PERFORMANCE 6-CHANNEL AC’97 2.3 CODEC WITH UNIVERSAL JACKS™
STAC9758/9759
V 1.2 1206