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3 external event clock reload mode – FUJITSU MB91460 SERIES FR60 User Manual

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Chapter 38 Reload Timer

5.Operation

5.3 External Event Clock Reload Mode

External event reload mode counts external events and outputs a pulse with a 50% duty ratio.

(1)

Set reload value to reload register

(2)

Enable reload timer count operation

(3)

TOT pin output

(4)

Generate reload trigger (activation): software trigger only

(5)

Load reload value

(6)

TOT pin output (initial value)

(7)

Counter count down (external event synchronous)

(9)

TOT pin output level reversal

(10)

Reload reload value

(11)

Repeat steps (6) to (9)

(See “

8. Caution (Page No.794)

”.)

FFFF

-1

0000

-1

0000

-1

T = CLKP

OUTL=0

OUTL=1

TMRLR

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

(5)

(10)

Reload

data

Load

data

Reload

data

[Reload register setting value + 1]

Count start

Count

Reload data

External event (clock)

Activation trigger
(Soft only)

Underflow

Data load

0 (Min)

When RELD=1

Toggle output

Counter

TOT output waveform

CNTE bit

Repeat