Scanlab RTC6 PCIe Board - Page 294

RTC6 boards
Doc. Rev. 1.0.21 en-US
9 Programming Peripheral Interfaces
294
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If a further External Start is missed within the track
delay, then you should delete the wait loop
(otherwise the encoder counter needs to run through
a full 31-bit sequence before a start can again be
successfully triggered). Deletion can be accomplished
by resetting the track delay with
set_ext_start_delay.
In any case, Bit #10 needs to first be reset (disabled)
for initialization and then a (one-time) External Start
must be triggered (for external start signals Bit #0
must be set) before Bit #10 can again be set (see
example). Otherwise, the first track delay in the wait
loop is undefined.
70
Regular and irregular External Starts (see text for description).
2
2
1
1
Start
Start Start
Start
Start
Start Start
Bit #10 = 0:
Bit #10 = 1:
Execution
time
Execution
time
Execution
time
Track delay
Execution
time
Track delay
Execution
time
Track delay
Track delay Track delay
Time
Time
Legend
1 simulate_ext_start.
2 /START or /START2 or /Slave-START.