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6. APPLICATION FUNCTIONS
6.24.4 Interrupt processing high speed completion
Using the interrupt processing high speed complete signal (ITFE) as a substitute of the interrupt processing
complete signal (ITE) shortens the time for interrupt processing completion.
(1) High response interrupt processing completion using the interrupt processing high speed complete signal
(ITFE)
For interrupt processing completion, the interrupt thread or device driver turns on the interrupt processing
high speed complete signal (ITFE) as a substitute of the interrupt processing complete signal (ITE). On
receiving the interrupt processing high speed complete signal (ITFE), the position board turns off the signal
(ITFE), and the interrupt processing is completed. The interrupt thread or device driver does not need to
wait until the outputting with factor of interrupt (ITO) is turned off, and the next operation can be performed.
Interrupt processing high
speed complete (ITFE)
ON
OFF
ON
OFF
Outputting with factor of
interrupt (ITO)
Position board
is turned off.
Interrupt thread or device driver
does not need to wait until the
outputting with factor of interrupt
(ITO) is turned off.
(2) Conventional interrupt processing completion using the interrupt processing complete signal (ITE)
The conventional interrupt processing requires the interrupt processing complete signal (ITE) to be on, then
waiting until the outputting with factor of interrupt (ITO) is turned off, and then the interrupt processing
complete signal (ITE) to be off. Therefore, interrupt processing completion is delayed by about one control
cycle until the outputting with factor of interrupt (ITO) is turned off.
ON
OFF
Interrupt processing
complete (ITE)
ON
OFF
Outputting with factor
of interrupt (ITO)
About one control cycle at shortest