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M16C/5L Group, M16C/56 Group
28.11.5 Timer A (Pulse Width Modulation Mode)
28.11.5.1 Changing Operating Modes
The IR bit becomes 1 when setting a timer operating mode with any of the following:
•
Selecting PWM mode or programmable output mode after reset
•
Changing the operating mode from timer mode to PWM mode or programmable output mode
•
Changing the operating mode from event counter mode to PWM mode or programmable output
mode
To use the timer Ai interrupt (IR bit), set the IR bit to 0 by a program after the changes listed above
are made.
28.11.5.2 Stop While Counting
When setting the TAiS bit to 0 (count stopped) during PWM pulse output, the following occur:
When the POFSi bit in the TAPOFS register is 0:
•
Counting stops
•
When the TAiOUT pin is high, the output level goes low and the IR bit becomes 1.
•
When the TAiOUT pin is low, both the output level and the IR bit remain unchanged.
When the POFSi bit in the TAPOFS register is 1:
•
Counting stops.
•
When the TAiOUT pin output is low, the output level goes high and the IR bit is set to 1.
•
When the TAiOUT pin output is high, both the output level and the IR bit remain unchanged.
R01UH0127EJ0110 Rev.1.10
Sep 01, 2011
28. Usage Notes
Page 778 of 803
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