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Chapter 2
Configuration and Installation
© National Instruments Corporation
2-11
PC-DIO-24 User Manual
Mode 2 Bidirectional Timing
The following figure illustrates the timing specifications for bidirectional transfers in mode 2.
T2
T1
WR*
OBF*
INTR
ACK*
DATA
T6
T7
T3
T4
T10
STB*
T9
T8
T5
IBF
RD*
Name
Description
Minimum
Maximum
T1
WR* = 1 to OBF* = 0
–
150
T2
Data before STB* = 1
20
–
T3
STB* pulse width
100
–
T4
STB* = 0 to IBF = 1
–
150
T5
Data after STB* = 1
50
–
T6
ACK* = 0 to OBF = 1
–
150
T7
ACK* pulse width
100
–
T8
ACK* = 0 to output
–
150
T9
ACK* = 1 to output float
20
250
T10
RD* = 1 to IBF = 0
–
150
All timing values are in nanoseconds.
Summary of Contents for PC-DIO-24
Page 51: ...Appendix C OKI 82C55A Data Sheet PC DIO 24 User Manual C 2 National Instruments Corporation...
Page 52: ...Appendix C OKI 82C55A Data Sheet National Instruments Corporation C 3 PC DIO 24 User Manual...
Page 53: ...Appendix C OKI 82C55A Data Sheet PC DIO 24 User Manual C 4 National Instruments Corporation...
Page 54: ...Appendix C OKI 82C55A Data Sheet National Instruments Corporation C 5 PC DIO 24 User Manual...
Page 55: ...Appendix C OKI 82C55A Data Sheet PC DIO 24 User Manual C 6 National Instruments Corporation...
Page 56: ...Appendix C OKI 82C55A Data Sheet National Instruments Corporation C 7 PC DIO 24 User Manual...
Page 57: ...Appendix C OKI 82C55A Data Sheet PC DIO 24 User Manual C 8 National Instruments Corporation...
Page 58: ...Appendix C OKI 82C55A Data Sheet National Instruments Corporation C 9 PC DIO 24 User Manual...
Page 59: ...Appendix C OKI 82C55A Data Sheet PC DIO 24 User Manual C 10 National Instruments Corporation...
Page 60: ...Appendix C OKI 82C55A Data Sheet National Instruments Corporation C 11 PC DIO 24 User Manual...
Page 61: ...Appendix C OKI 82C55A Data Sheet PC DIO 24 User Manual C 12 National Instruments Corporation...
Page 62: ...Appendix C OKI 82C55A Data Sheet National Instruments Corporation C 13 PC DIO 24 User Manual...
Page 63: ...Appendix C OKI 82C55A Data Sheet PC DIO 24 User Manual C 14 National Instruments Corporation...
Page 64: ...Appendix C OKI 82C55A Data Sheet National Instruments Corporation C 15 PC DIO 24 User Manual...
Page 65: ...Appendix C OKI 82C55A Data Sheet PC DIO 24 User Manual C 16 National Instruments Corporation...
Page 66: ...Appendix C OKI 82C55A Data Sheet National Instruments Corporation C 17 PC DIO 24 User Manual...