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Chapter 5 Signal Timing
© National Instruments Corporation 5-13 DIO 6533 User Manual
Figure 5-11. Level-ACK 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
225 —
t
ra*
REQ to ACK inactive
100 200
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
—
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)
t
r*r
t
r*do
t
ra*
t
doa
t
ar
t
aa*
t
rr*
t
rdo