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KPCI-PIO96 User’s Manual
I/O Address Mapping
4-3
Table 4-1
Data and control register addresses
* Data Register Format, 32 Bit
MSB
LSB
The control register bit assignments for each port group (port group 0 through port group 3) are identical.
These assignments are listed in Table 4-2.
Table 4-2
Control register bit assignments for each port group
Address
Contents
I/O Function
Base + 0x0 offset
Port group
1
0 data
Read/Write
Base + 0x4 offset
Port group 1 data
Read/Write
Base + 0x8 offset
Port group 2 data
Read/Write
Base + 0xC offset
Port group 3 data
Read/Write
Base + 0x10 offset
Control register bits for
port group 0
Write only
Base + 0x14 offset
Control register bits for
port group 1
Write only
Base + 0x18 offmset
Control register bits for
port group 2
Write only
Base + 0x1C offset
Control register bits for
port group 3
Write only
1
Each port group contains a PA port, a PB port and a PC port, as in
the emulated 8255 chip.
4 High
Bits of Port C
Not
Used
Not
Used
4 Low
Bits of Port C
8 Bits of
Port B
8 Bits of
Port A
Bit
number
Function
Variable name for bit
I/O direction for this port
3
When bit
value = 0
3
When bit
value = 1
Bit 7
Not used
N/A
N/A
N/A
Bit 6
Not used
N/A
N/A
N/A
Bit 5
Not used
N/A
N/A
N/A
Bit 4
Not used
N/A
N/A
N/A
Bit 3
I/O direction for PC
port, upper half
PCHI[port group
2
]_DIR
Input
Output
Bit 2
I/O direction for PC
port, lower half
PCLO[port group
2
]_DIR
Input
Output
Bit 1
I/O direction for PB port PB[port group
2
]_DIR
Input
Output
Bit 0
I/O direction for PA port PA[port group
2
]_DIR
Input
Output
2
Port group number: 0, 1, 2 or 3
3
All bit values default to ‘0’ upon computer reset or power-up
*
*
*
*
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Содержание KPCI-PIO96
Страница 12: ...1 Overview Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...
Страница 17: ...3 Installation Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...
Страница 32: ...5 Troubleshooting Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...
Страница 55: ...A Specifications Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...
Страница 57: ...B Glossary Artisan Technology Group Quality Instrumentation Guaranteed 888 88 SOURCE www artisantg com...