Rev. 1.0, 09/02, page 224 of 568
10.8 Operation
Timing
10.8.1 Input/Output
Timing
TCNT Count Timing: Figure 10.30 shows TCNT count timing in internal clock operation, and
figure 10.31 shows TCNT count timing in external clock operation.
TCNT
TCNT
input clock
Internal clock
φ
N-1
N
N+1
N+2
Falling edge
Rising edge
Figure 10.30 Count Timing in Internal Clock Operation
TCNT
TCNT
input clock
External clock
φ
N-1
N
N+1
N+2
Falling edge
Rising edge
Falling edge
Figure 10.31 Count Timing in External Clock Operation
Output Compare Output Timing: A compare match signal is generated in the final state in
which TCNT and TGR match (the point at which the count value matched by TCNT is updated).
When a compare match signal is generated, the output value set in TIOR is output at the output
compare output pin. After a match between TCNT and TGR, the compare match signal is not
generated until the TCNT input clock is generated.
Figure 10.32 shows output compare output timing.
Summary of Contents for H8S/2627
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