SH7708 Datasheet, PDF (326/625 Pages) Renesas Technology Corp – SuperH™ RISC engine

TCNT value
TCOR
TCOR value set to
TCNT during underflow
H'00000000
TCLK
TCPR2
Set TCNT value
Time
ICPI
Figure 11.7 Operation Timing when Using the Input Capture Function
(UsingTCLKRising Edge)
1 1 . 4 Interrupts
There are two sources of TMU interrupts: underflow interrupts (TUNI) and interrupts when using
the input capture function (TICPI2).
1 1 . 4 . 1 Status Flag Set Timing
UNF is set to 1 when the TCNT underflows (H'00000000 → H'FFFFFFFF). Figure 11.8 shows
the timing.
Pφ
TCNT
Underflow
signal
UNF
TUNI
H'00000000
TCOR value
Figure 11.8 UNF Set Timing
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