CTI Products IOB I/O Interface - Manual (Page 11)

IOB Hardware Reference Theory of Operation
CTI Products, Inc.
68-11168-105
6
Input Value
Field
Active I/O Bit
Combinations
Custom
Text
00 -
01 1
04 2
05 2 + 1
10 3
11 3 + 1
14 3 + 2
15 3 + 2 + 1
40 4
41 4 + 1
44 4 + 2
45 4 + 2 + 1
50 4 + 3
51 4 + 3 + 1
54 4 + 3 + 2
55 4 + 3 + 2 + 1
Table 3 - Input Value Definitions
Note: The IOB’s inputs and outputs are active low. Therefore, for a I/O bit to be
active, it must be pulled to ground. Also, when an output is active, it is driven
low by the IOB.