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Chapter 35 Free-Run Timer
5.Operation
5. Operation
5.1 Count Operation of the Free-run Timer
(1) Reset
(2) Clearing of the free-run timer by reset. (Count value “0000”)
(3) Count-up of the free-run timer
(4) Overflow and interrupt of the free-run timer.
(5) Clearing of the free-run timer by overflow. (Count value “0000”)
(6) Repeat (3) to (5)
(7) The free-run timer counts up at the count clock (the internal clock divided by n).
(8) The free-run timer counts up at the count clock (the external clock synchronized with the internal clock).
Peripheral
clock (CLKP)
Count
timing
The count of the
free-run timer
Reset
The overflow and the
interrupt request
Clearing the
free-run timer
The count of
the free-run
timer
Time
FFFFh
0000h
Internal clock
(F
CLKP
/2)
External pin
(CKI)
The count of the
free-run timer
Clear by software Clear by software
(Internal clock)
( F
CLKP
/2 )
(1)
(2)
(3)
(4)
(5)
()
(8)
(2)
(5)
Count
timing
(External clock F
CLKP
/2)
(1)
(2)
(3)
(4)
(5)
7
(2)
(5)