Hitachi SH7032 Hardware Manual page 322

Timing of Setting IMFA, IMFB for Input Capture: IMFA and IMFB are set to 1 by an input
capture signal. At this time, the TCNT contents are transferred to GR. Figure 10.55 shows the
timing.
CK
Input
capture
signal
IMF
TCNT
GR
IMI
Figure 10.55 Timing of Setting IMFA and IMFB for Input Capture
Timing of Setting Overflow Flag (OVF): OVF is set to 1 when TCNT overflows from H'FFFF
to H'0000 or underflows from H'0000 to H'FFFF. Figure 10.56 shows the timing.
CK
TCNT
Overflow
signal
OVF
OVI
H' FFFF
Figure 10.56 Timing of Setting OVF
N
N
H' 0000
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