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Chapter 7 Timer/Counter Units
7
Fig. 7-75 External Event Count Timing of 8-Bit Timer/Counter 2
(1) When occurrences of one edge are counted (maximum frequency = fCLK/24)
Remark ICI: CI input signal after passing through the edge detector
(2) When occurrences of both edges are counted (maximum frequency = fCLK/32)
Count
clock of
TM2
Dn + 2
32/fCLK(Min.)
16/fCLK(Min.)
16/fCLK(Min.)
16/fCLK
(constant)
CI
ICI
Countable
timing of
TM2
TM2 Dn + 1
Dn Dn + 3 Dn + 4 Dn + 5
8-12/fCLK
Remark ICI: CI input signal after passing through the edge detector
CI
ICI
Count
clock of
TM2
Countable
timing
of TM2
TM2 Dn Dn + 1 Dn + 2 Dn + 3
16/fCLK
(constant)
12/fCLK(Min.)12/fCLK(Min.)
24/fCLK(Min.)
8-12/fCLK