National Instruments PC-DIO-96 用户手册

The following figure illustrates the timing specifications for an input transfer in mode 1.

T3

T5

T6

T7

T4

T1

T2

STB*

IBF

INTR

RD*

DATA

T1

STB* pulse width

100

–

T2

STB* = 0 to IBF = 1

–

150

T3

Data before STB* = 1

20

–

T4

STB* = 1 to INTR = 1

–

150

T5

Data after STB* = 1

50

–

T6

RD* = 0 to INTR = 0

–

200

T7

RD* = 1 to IBF = 0

–

150

All timing values are in nanoseconds.