Mode 2 Bidirectional Timing - National Instruments PXI-6031E User Manual

Chapter 4 Digital I/O

Mode 2 Bidirectional Timing

Name
T1
T2
T3
T4
T5
T6
T7
T8
T9
T10
E Series User Manual
(NI 6016 and NI 6025E Devices Only)
specifications for a bidirectional transfer in mode 2.
WR *
OBF *
INTR
ACK *
STB *
IBF
RD *
DATA
Figure 4-5. Bidirectional Transfer Timing Specifications
Table 4-5. Bidirectional Transfer Timing Specification
Description
WR* = 1 to OBF* = 0
Data before STB* = 1
STB* Pulse Width
STB* = 0 to IBF = 1
Data after STB* = 1
ACK* = 0 to OBF* = 1
ACK* Pulse Width
ACK* = 0 to Output
ACK* = 1 to Output Float
RD* = 1 to IBF = 0
Figure 4-5 and Table 4-5 show timing
T1
T3
T4
T2 T5
Minimum (ns)
—
20
100
—
50
—
100
—
20
—
4-8
T6
T7
T10
T8 T9
Maximum (ns)
150
—
—
150
—
150
—
150
250
150
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