National Instruments DIO 6533 - Manual (Page 85)

Chapter 5 Signal Timing
DIO 6533 User Manual 5-26 © National Instruments Corporation
Figure 5-22. Trailing-Edge Mode Input Timing
Parameter Description Minimum Maximum
Input Parameters
t
rr*
REQ pulse width 75 —
t
r*r
REQ inactive duration 75 —
t
dir*
Input data setup to REQ inactive
(with REQ-edge latching) 0 —
t
r*di
Input data hold from REQ inactive
(with REQ-edge latching) 10 —
t
dir
Input data setup to REQ
(with REQ-edge latching disabled) 0 —
t
adi
Input data hold from ACK
(with REQ-edge latching disabled) 0 —
Output Parameters
t
aa* ACK pulse width 225 1 275 2
t
a*r*
ACK inactive to next REQ inactive 0 —
1 t
aa*
(min) = 225 + programmable delay All timing values are in nanoseconds.
2 t
aa*
(max) = 275 + programmable delay
REQ
ACK
Input Data
(REQ-edge latching)
Input Data
(REQ-edge
latching disabled)
tdir*
tr*r
tdir
taa* ta*r*
trr*
tr*di
tadi
tadi