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Chapter 3 Signal Connections
PC-DIO-24/PnP User Manual 3-12
©
National Instruments Corporation
Mode 1 Input Timing
The following figure illustrates the timing specifications for an input
transfer in mode 1.
Figure 3-5.
Mode 1 Timing Specification for Input Transfers
Name Description Minimum Maximum
T1
STB* pulse width
100 —
T2
STB* = 0 to IBF* = 1
—150
T3
Data before STB* = 1
20 —
T4
STB* = 1 to INTR = 1
—150
T5
Data after STB* = 1
50 —
T6
RD* = 0 to INTR = 0
—200
T7
RD* = 1 to IBF = 0
—150
All timing values are in nanoseconds.
T3
T5
T6
T7
T4
T1
T2
STB*
IBF
INTR
RD*
DATA