7540 datasheet(155/366 Pages) RENESAS

155 / 366 page

2-79

REJ09B0018-0200Z

Rev.2.00

Jun 21, 2004

7540 Group

APPLICATION

2.5 Timer Y and timer Z

Fig. 2.5.23 Timing diagram of programmable waveform generation mode

Timer Y

primary

reload

Contents of timer Y

TYOUT pin output

Timer Y count clock

Timer Y count stop bit

Timer Y interrupt request bit

Timer Y output level latch

“0” is written

Count start

0216

0316

0116 0016 0216 0116 0016

0316

0216 0116 0016 0216 0116

q When “0316” is set to TYP and “0216” is set to TYS.

Underflow

Timer Y

secondary

reload

Secondary waveform extension

(Note 2)

(Note 2)(Note 2)

Initialized to “L”

Waveform output start

Notes 1: In this case, timer Y primary waveform is not extended, timer Y secondary waveform is extended.

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

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

Timer Y

secondary

reload

(Note 1)

“0” is written

Waveform output inverted

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