Chapter 3 Signal Connections
PCI-DIO-96 User Manual 3-12
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National Instruments Corporation
Mode 2 Bidirectional Timing
The timing specifications for bidirectional transfers in mode 2 are as
follows:
Figure 3-6. Timing Specifications for Mode 2 Bidirectional Transfer
Name Description Minimum Maximum
T1 WR* = 1 to OBF* = 0 — 150
T2 Data before STB* = 1 20 —
T3 STB* Pulse Width 100 —
T4 STB* = 0 to IBF = 1 — 150
T5 Data after STB* = 1 50 —
T6 ACK* = 0 to OBF* = 1 — 150
T7 ACK* Pulse Width 100 —
T8 ACK* = 0 to Output — 150
T9 ACK* = 1 to Output Float 20 250
T10 RD* = 1 to IBF = 0 — 150
All timing values are in nanoseconds.
T1
T6
T7
T3
T4 T10
T2 T5 T8 T9
WR *
OBF *
INTR
ACK *
STB *
IBF
RD *
DATA