National Instruments DIO 6533 - Manual (Page 71)

Chapter 5 Signal Timing
DIO 6533 User Manual 5-12 © National Instruments Corporation
Figure 5-10. Level-ACK Mode Input Timing
Parameter Description Minimum Maximum
Input Parameters
t
rr*
REQ pulse width 75 —
t
r*r
REQ inactive duration 75 —
t
ar
ACK to next REQ 0 —
t
dir(1)
Input data setup to REQ active
(with REQ-edge latching) 0 —
t
rdi
Input data hold from REQ active
(with REQ-edge latching) 10 —
t
dir(2)
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 —
t
ra*
REQ to ACK inactive 100 200
All timing values are in nanoseconds.
REQ
ACK
Input Data
(REQ-edge latching)
Input Data
(REQ-edge
latching disabled)
tr*r
tra*
tdir(2)
tadi
tar
taa*
trr*
trdi tdir(1)