Measurement Computing PPIO-DIO24H - Manual (Page 10)

4.2.2 Read Data Signals: (BASE + 1):
PIN BIT SIGNAL DESCRIPTION COMMON NAME
0 NA
1 NA
2 NA
15 3 READ DATA 0 OR 4 ERROR
13 4 READ DATA 1 OR 5 SLCT OUT
12 5 READ DATA 2 OR 6 PAPER OUT
10 6 PATH FOR INTERRUPT, IF USED ACK
11 7 READ DATA 3 OR 7 -BUSY
4.2.3 Write Data Signals: (BASE + 0):
PIN BIT SIGNAL DESCRIPTION COMMON NAME
2 0 WRITE DATA OR ADDRESS D0
3 1 WRITE DATA OR ADDRESS D1
4 2 WRITE DATA OR ADDRESS D2
5 3 WRITE DATA OR ADDRESS D3
6 4 WRITE DATA OR ADDRESS D4
7 5 WRITE DATA OR ADDRESS D5
8 6 WRITE DATA OR ADDRESS D6
9 7 WRITE DATA OR ADDRESS D7
4.3 CONTROL & DATA REGISTERS
The PPIO-DIO24H has three data and one control register. They occupy four
consecutive I/O locations. Direct register manipulation is best done with ASSEMBLY
language programs.
The register descriptions follow the format:
A0 A1 A2 A3 A4 A5 A6 A7
0 1 2 3 4 5 6 7
The numbers along the top row are the bit positions within the byte and the numbers
and symbols in the bottom row are the functions of each bit.
To write to or read from a register in decimal or HEX, the weights in Table 4-1 apply:
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