Mode 2 Bidirectional Timing - National Instruments PCI-1200 User Manual

Chapter 3 Signal Connections
WRT *
OBF *
INTR
ACK *
STB *
IBF
RD *
DATA
Name
T1 WRT* = 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.
NI PCI-1200 User Manual

Mode 2 Bidirectional Timing

The timing specifications for bidirectional transfers in mode 2 are as
follows.
T1
T3
T4
T2
Description
Figure 3-19. Mode 2 Timing Specifications for Bidirectional Transfers
T6
T7
T5
T8
Minimum
3-30
T10
T9
Maximum
— 650
0 —
500 —
— 300
180 —
— 350
300 —
— 300
20 250
— 300
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