
PC Card Controller Programming Model
94
September 2005
SCPS110
4.33 General-Purpose Input Register
The general-purpose input register contains the logical value of the data input to the GPI terminals. See
Table 412 for a complete description of the register contents.
PCI register offset:
8Ah
Register type:
Read/Update, Read-only
Default value:
XXh
BIT NUMBER
7
6
5
4
3
2
1
0
RESET STATE
0
X
Table 412. General-Purpose Input Register Description
BIT
SIGNAL
TYPE
FUNCTION
75
RSVD
R
Reserved. These bits return 000b when read. Writes have no effect.
4
GPI4_DATA
RU
GPI4 data input. This bit represents the logical value of the data input from GPI4.
3
GPI3_DATA
RU
GPI3 data input. This bit represents the logical value of the data input from GPI3.
2
GPI2_DATA
RU
GPI2 data input. This bit represents the logical value of the data input from GPI2.
1
GPI1_DATA
RU
GPI1 data input. This bit represents the logical value of the data input from GPI1.
0
GPI0_DATA
RU
GPI0 data input. This bit represents the logical value of the data input from GPI0.
4.34 General-Purpose Output Register
The general-purpose output register is used to drive the GPO4GPO0 outputs. See Table 413 for a complete
description of the register contents.
PCI register offset:
8Bh
Register type:
Read-only, Read/Write
Default value:
00h
BIT NUMBER
7
6
5
4
3
2
1
0
RESET STATE
0
Table 413. General-Purpose Output Register Description
BIT
SIGNAL
TYPE
FUNCTION
75
RSVD
R
Reserved. These bits return 000b when read. Writes have no effect.
4
GPO4_DATA
RW
This bit represents the logical value of the data driven to GPO4.
3
GPO3_DATA
RW
This bit represents the logical value of the data driven to GPO3.
2
GPO2_DATA
RW
This bit represents the logical value of the data driven to GPO2.
1
GPO1_DATA
RW
This bit represents the logical value of the data driven to GPO1.
0
GPO0_DATA
RW
This bit represents the logical value of the data driven to GPO0.
This bit is cleared only by the assertion of GRST.