National Instruments 653X user manual t t

Chapter 3 Timing Diagrams
© National Instruments Corporation 3-37 653X User Manual
Figure 3-34. Long Pulse Input Timing Diagram
Parameter Description Minimum Maximum
Input Parameters
trr* REQ pulse width 75 —
tr*r REQ inactive duration 75 —
tar ACK to next REQ 0 —
tdir(1) Input data setup to REQ active
(with REQ-edge latching)
0—
trdi Input data hold from REQ active
(with REQ-edge latching)
10 —
tdir(2) Input data setup to REQ
(with REQ-edge latching disabled)
0—
tadi Input data hold from ACK
(with REQ-edge latching disabled)
0—
Output Parameters
taa* ACK pulse width 1251—
tr*a* REQ inactive to ACK inactive 150 —
1 taa*(min.) = 125 + programmable delay
REQ
Input Data Valid
(REQ-edge
latching)
Input Data Valid
(REQ-edge
latching disabled)
tr*r
tr*a*
tdir(2) tadi
tar
taa*
trr*
trdi tdir(1)
ACK
ACK and REQ are shown as active high