Mode 2 Bidirectional Timing - National Instruments PC-DIO-96 User Manual

Chapter 2

Mode 2 Bidirectional Timing

The following figure illustrates the timing specifications for bidirectional transfers in mode 2.
WR*
OBF*
INTR
ACK*
STB*
IBF
RD*
DATA
Name Description
T1 WR* = 1 to OBF* = 0
T2 Data before STB* = 1
T3 STB* pulse width
T4 STB* = 0 to IBF = 1
T5 Data after STB* = 1
T6 ACK* = 0 to OBF = 1
T7 ACK* pulse width
T8 ACK* = 0 to output
T9 ACK* = 1 to output float
T10 RD* = 1 to IBF = 0
All timing values are in nanoseconds.
© National Instruments Corporation
T1
T6
T7
T3
T4
T2 T5 T8
Minimum Maximum
– 150
20
100
– 150
50
– 150
100
– 150
20 250
– 150
2-17
Configuration and Installation
T10
T9
–
–
–
–
PC-DIO-96 User Manual