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Operation, 1 count operation of the free-run timer, Chapter 35 free-run timer 5.operation – FUJITSU MB91460 SERIES FR60 User Manual

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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

0000 h

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)