STAC9752 Datasheet, PDF (67/95 Pages) Integrated Device Technology – TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH HEADPHONE DRIVE, SPDIF OUTPUT MICROPHONE & JACK SENSING

STAC9752/9753
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH HEADPHONE DRIVE, SPDIF OUTPUT MICROPHONE & JACK SENSING
8.2.8.
GPIO Pin Mask Register (52h)
Default: 0000h
D15
D14
D7
D6
D13
D12
D11
RESERVED
D5
D4
D3
RESERVED
D10
D9
D8
D2
D1
D0
GW1
(GPIO1)
GW0
(GPIO0)
Bit(s)
15:2
1
0
Access
Read Only
Read / Write
Read / Write
Reset Value
0
0
0
Name
RESERVED
GW1
GW0
Description
Bit not used, should read back 0
0 = GPIO1 interrupt not passed to GPIO_INT slot 12.
1 = GPIO1 interrupt is passed to GPIO_INT slot 12.
0 = GPIO0 interrupt not passed to GPIO_INT slot 12.
1 = GPIO0 interrupt is passed to GPIO_INT slot 12.
8.2.9.
GPIO Pin Status Register (54h)
Default: 0000h
D15
D14
D7
D6
D13
D12
D11
RESERVED
D5
D4
D3
RESERVED
D10
D9
D8
D2
D1
D0
GI1 (GPIO1) GI0 (GPIO0)
Bit(s) Access Reset Value Name
Description
15:2 Read Only
0
RESERVED Bits not used, should read back 0
1 Read / Write
x
When GPIO1 is configured as output and Register h74 bit[0] = 0
(default), the value of this register will be placed on the GPIO1
pad.
When GPIO1 is configured as output and Register h74 bit[0] =1,
the GPIO1 pad will get its value from slot12.
GI1
When GPIO1 is configured as input and configured as a sticky bit,
writing a 1 does nothing, writing a 0 clears this bit.
When GPIO1 is configured as input, this register reflects the value
on the GPIO1 pad after interpretation of the polarity and sticky
configurations.
0 Read / Write
x
When GPIO0 is configured as output and Register h74 bit[0] = 0
(default), the value of this register will be placed on the GPIO0
pad.
When GPIO0 is configured as output and Register h74 bit[0] =1,
the GPIO0 pad will get its value from slot12.
GI0
When GPIO0 is configured as input and configured as a sticky bit,
writing a 1 does nothing, writing a 0 clears this bit.
When GPIO0 is configured as input, this register reflects the value
on the GPIO0 pad after interpretation of the polarity and sticky
configurations.
IDT™
67
STAC9752/9753
TWO-CHANNEL, 20-BIT, AC’97 2.3 CODECS WITH HEADPHONE DRIVE, SPDIF OUTPUT MICROPHONE & JACK SENSING
REV 3.3 1206