Compare Match Timing - Hitachi H8/329 Series Hardware Manual

Ø
External clock
source
TCNT clock
pulse
TCNT
Figure 7-3. Count Timing for External Clock Input
Ø
TMCI
Ø
TMCI
Figure 7-4. Minimum External Clock Pulse Widths (Example)

7.3.2 Compare Match Timing

(1) Setting of Compare-Match Flags A and B (CMFA and CMFB): The compare-match flags
are set to "1" by an internal compare-match signal generated when the timer count matches the time
constant in TCNT or TCOR. The compare-match signal is generated at the last state in which the
match is true, just before the timer counter increments to a new value.
N – 1
Minimum TMCI Pulse Width
(Single-Edge Incrementation)
Minimum TMCI Pulse Width
(Double-Edge Incrementation)
N
153
N + 1