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TCNT value
TCOR
H'00000000
TCLK
TCPR2
TICPI2
Figure 12.7 Operation Timing when Using Input Capture Function
12.4
Interrupts
There are four TMU interrupt sources, comprising underflow interrupts and the input capture
interrupt (when the input capture function is used). Underflow interrupts are generated on each of
the channels, and input capture interrupts on channel 2 only.
An underflow interrupt request is generated (for each channel) when the UNF bit in TCR is 1 and
the interrupt enable bit for the corresponding channel is 1.
When the input capture function is used and an input capture request is generated, an interrupt is
requested if the input capture input flag (ICPF) in TCR2 is 1 and the input capture control bits
(ICPE1, ICPE0) in TCR2 are 11.
The TMU interrupt sources are summarized in table 12.3.
Rev. 6.0, 07/02, page 308 of 986
TCOR value set in TCNT
on underflow
TCNT value set
Time
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