National Instruments 3.21E+04 用户手册

Chapter 4     Signal Connections

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 National Instruments Corporation

4-57

AT-MIO/AI E Series User Manual

The following are the timing specifications for bidirectional transfers in 
Mode 2:

Figure 4-40.  Mode 2 Bidirectional Timing

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