HP NuDAQ I-9111DG/HR 3.15D/A Output Register, 3.16Timer/Counter Register, Attribute:, Data Format:, Data Format:, Address: BASE +, Address: BASE + 2h, Attribute: write only

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:
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

3.15D/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)

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

3.16Timer/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:

“http://support.intel.com/support/controllers/peripheral/231164.htm”

or “http://www.tundra.com/”

Address: BASE + 40h ~ BASE + 46h

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)

Registers Format ∙ 21