Kontron CP381 - Manual (Page 5)

CP381 Preface
ID 24107, Rev. 01 © 2002 PEP Modular Computers GmbH Page v
Chapter
4
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
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