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Rev. 5.00, 09/03, page 404 of 760
TCNT value
TCOR
H'00000000
TCLK
TCPR2 Set TCNT value
ICPI
TCOR value set to
TCNT during underflow
Time
Figure 12.7 Operation Timing when Using Input Capture Function
(Using TCLK Rising Edge)
12.4 Interrupts
There are two sources of TMU interrupts: underflow interrupts (TUNI) and interrupts when using
the input capture function (TICPI2).
12.4.1 Status Flag Setting Timing
UNF is set to 1 when the TCNT underflows. Figure 12.8 shows the timing.
Pφ
TCNT
Underflow
signal
UNF
TUNI
TCOR valueH'00000000
Figure 12.8 UNF Setting Timing