Table of Contents
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CP381
Chapter
4.
Configuration .............................................................................................. 4 - 3
4.1
Jumper Settings .................................................................................... 4 - 3
4.2
Digital Input Signal Requirements. ........................................................ 4 - 3
4.2.1
Channels ....................................................................................... 4 - 3
4.2.2
Signal Characteristics ................................................................... 4 - 3
4.2.3
Channel Configuration .................................................................. 4 - 4
4.3
Programming Interface .......................................................................... 4 - 6
4.3.1
Access Control Logic (Address Decoder) ..................................... 4 - 6
4.3.2
Reading Input Data ....................................................................... 4 - 7
4.3.3
Debouncing Inputs ........................................................................ 4 - 8
4.3.4
Detecting Input Events .................................................................. 4 - 9
4.3.5
Latching on Input Events ............................................................ 4 - 10
4.3.6
Comparing Input Patterns ........................................................... 4 - 10
4.3.7
Hardware Debug/Test Registers ................................................ 4 - 11
4.3.8
Generating Interrupts .................................................................. 4 - 12
4.3.9
Programming the Board Capability ROM ................................... 4 - 13
Chapter
5.
System Considerations ............................................................................... 5 - 3
5.1
Introduction ........................................................................................... 5 - 3
5.2
General ................................................................................................. 5 - 3
5.3
Shielding ............................................................................................... 5 - 3
5.4
Debouncing ........................................................................................... 5 - 4
5.5
Process-side Signal Conditioning ......................................................... 5 - 4
5.6
Cable Interfacing ................................................................................... 5 - 4
ID 24107, Rev. 01
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5
© 2002 PEP Modular Computers GmbH
Preface
Page v
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Table of Contents
