National Instruments PC-DIO-24/PnP - Manual (Page 35)

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