National Instruments PCI-1200 - Manual (Page 52)

Chapter 3 Signal Connections
PCI-1200 User Manual 3-30 © National Instruments Corporation
Mode 2 Bidirectional Timing
The timing specifications for bidirectional transfers in mode 2 are as
follows:
Figure 3-19. Mode 2 Timing Specifications for Bidirectional Transfers
Name Description Minimum Maximum
T1 WRT* = 1 to OBF* = 0 — 650
T2 Data before STB* = 1 0 —
T3 STB* pulse width 500 —
T4 STB* = 0 to IBF = 1 — 300
T5 Data after STB* = 1 180 —
T6 ACK* = 0 to OBF* = 1 — 350
T7 ACK* pulse width 300 —
T8 ACK* = 0 to output — 300
T9 ACK* = 1 to output float 20 250
T10 RD* = 1 to IBF = 0 — 300
All timing values are in nanoseconds.
T1
T6
T7
T3
T4
T10
T2 T5 T8 T9
WRT *
OBF *
INTR
ACK *
STB *
IBF
RD *
DATA