National Instruments DIO 6533 - Manual (Page 77)

Chapter 5 Signal Timing
DIO 6533 User Manual 5-18 © National Instruments Corporation
Figure 5-15. Leading-Edge Mode Output 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 —
Output Parameters
t
aa*
ACK pulse width 125 —
t
r*a*
REQ inactive to ACK inactive 150 —
t
r*do
REQ inactive to new output data
(with REQ-edge latching) 0 50
t
rdo
REQ to new output data
(with REQ-edge latching disabled) 0 —
t
doa
Output data valid to ACK
(with REQ-edge latching disabled) 25 1 —
1 t
doa (min) = 25 + programmable delay
All timing values are in nanoseconds.
REQ
ACK
Output Data
(REQ-edge latching)
Output Data
(REQ-edge
latching disabled)
tr*r
tr*a*
tr*do
tdoa
tar
taa*
trr*
trdo