Chapter 4
Signal Connections
DAQCard-DIO-24 User Manual
4-10
©
National Instruments Corporation
Mode 1 Input Timing
Figure 4-4 illustrates the timing specifications for an input transfer in
mode 1.
Figure 4-4.
Timing Specifications for Mode 1 Input Transfer
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