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Single-Chip Dual-Channel AC’97 Audio Codec
EMP202
EMPIA Technology
7/15/2002
19
5.2.2.MX4C GPIO Pin Configuration
Default: 0003H
Bit
Type
Function
15:2
-
Reserved
1
R/W
GC1
0 GPIO1 configured as output
1 GPIO1 configured as input
0
R/W
GC0
0 GPIO0 configured as output
1 GPIO0 configured as input
5.2.3.MX4E GPIO Pin Polarity/Type
Default: FFFFH
Bit
Type
Function
15:2
-
Reserved
1
R/W
GP1
0 GPIO1 polarity inverted
1 GPIO1 polarity inverted
0
R/W
GP0
0 GPIO0 polarity inverted
1 GPIO0 polarity inverted
5.2.4.MX50 GPIO Pin Sticky
Default: 0000H
Bit
Type
Function
15:2
-
Reserved
1
R/W
GS1
0 GPIO1 non sticky
1 GPIO1 sticky
0
R/W
GS0
0 GPIO1 non sticky
1 GPIO1 sticky
5.2.5.MX50 GPIO Pin Status
Default: 0000H
Bit
Type
Function
15:2
-
Reserved
1:0
R/W
GI1 (GPIO1/0)
As output, use with MX74:D0 to set
If D0=0, the respective register value placed on pad (D1 for GPIO1, D0 for
GPIO0)
If D0=1, pad get value from slot 12
As input and sticky
0 clears this bit
1 does nothing
As input and non sticky
This register gives GPIO1 value from pad.
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