7540 datasheet(161/366 Pages) RENESAS

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2-85

REJ09B0018-0200Z

Rev.2.00

Jun 21, 2004

7540 Group

APPLICATION

2.5 Timer Y and timer Z

Fig. 2.5.28 Timing diagram of programmable one-shot generation mode

0216

0316

0116 0016

0316

0216 0116 0016

(Note 3)

One-shot start bit

INT0 pin input

(Note 1)

Set to “1” by

INT0 pin input

trigger

Contents of timer Z

TZOUT pin output

Timer Z count clock

Timer Z count stop bit

Timer Z interrupt request bit

Timer Z output level latch

“0” is written

Count start

q When “0316” is set to TZP

Underflow

Timer Z

primary

reload

Waveform extension

Initialized to “L”

Waveform output start

Notes 1: In this case, INT0 pin one-shot trigger valid.

2: In this case, timer Z primary waveform is extended.

3: In this time, “0” is written to the timer Z interrupt request bit or the timer Z interrupt request bit

is cleared to “0” by accepting the timer Z interrupt request.

(Note 2)

“0” is written

“1” is written

Underflow

Timer Z

primary

reload

Count

start

Waveform extension

Waveform output start

Waveform output end

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