HP (Hewlett-Packard) PCI-9111DG/HR Manual De Usuario
Registers Format
•
21
Bit
7
6
5
4
3
2
1
0
Base + 2h
DI7
DI6
DI5
DI4
DI3
DI2
DI1
DI0
Base + 3h
DI15
DI14
DI13
DI12
DI11
DI10
DI9
DI8
Address: BASE + 2h
Attribute: write only
Data Format:
Attribute: write only
Data Format:
Bit
7
6
5
4
3
2
1
0
Base + 2h
DO7
DO6
DO5
DO4
DO3
DO2
DO1
DO0
Base + 3h DO15 DO14 DO13 DO12 DO11 DO10 DO9
DO8
3.15 D/A Output Register
The D/A converter will convert the D/A output digital data to analog signal.
Address: BASE + 0
Attribute: write only
Data Format: (for D/A Channel 1)
Attribute: write only
Data Format: (for D/A Channel 1)
Bit
7
6
5
4
3
2
1
0
Base + 0
DA7
DA6
DA5
DA4
DA3
DA2
DA1
DA0
Base + 1
---
---
---
---
DA11 DA10
DA9
DA8
DA0 is the LSB and DA11 is the MSB of the 12 bits data.
---: don't care
---: don't care
3.16 Timer/Counter Register
Each 82C54 chip occupies 4 I/O address locations in the PCI-9111 as
shown blow. Users can refer to 82C54 data sheet for the descriptions
about all the features of 82C54. You can download the data sheet on the
following web site:
shown blow. Users can refer to 82C54 data sheet for the descriptions
about all the features of 82C54. You can download the data sheet on the
following web site:
“http://support.intel.com/support/controllers/peripheral/231164.htm”
or “http://www.tundra.com/”
Address: BASE + 40h ~ BASE + 46h
Attribute: read / write
Data Format:
Attribute: read / write
Data Format:
Base + 40h
Counter 0 Register (R/W)
Base + 42h
Counter 1 Register (R/W)
Base + 44h
Counter 2 Register (R/W)
Base + 46h
8254 CONTROL BYTE (W)