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Chapter 5 Signal Timing
DIO 6533 User Manual 5-22 © National Instruments Corporation
Figure 5-19. Long-Pulse 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
1
—
t
r*do
REQ inactive to new output data
(with REQ-edge latching)
050
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
t
aa*
(min)
= 125 + programmable delay All timing values are in nanoseconds.
REQ
ACK
Output Data
(REQ-edge latching)
Output Data
(REQ-edge
latching disabled)
t
r*r
t
r*do
t
doa
t
ar
t
aa*
t
rr*
t
rdo