National Instruments Low-Cost Multifunction I/O Board for ISA Lab-PC+ - Manual (Page 49)

Signal Connections Chapter 3
Lab-PC+ User Manual 3-18 © National Instruments Corporation
Mode 1 Input Timing
The timing specifications for an input transfer in Mode 1 are as follows:
DATA
RD *
INTR
IBF
STB *
T1
T2 T4
T7
T6
T3 T5
Name Description Minimum Maximum
T1 STB* pulse width 500 –
T2 STB* = 0 to IBF = 1 – 300
T3 Data before STB* = 1 0 –
T4 STB* = 1 to INTR = 1 – 300
T5 Data after STB* = 1 180 –
T6 RD* = 0 to INTR = 0 – 400
T7 RD* = 1 to IBF = 0 – 300
All timing values are in nanoseconds.