4509 Datasheet, PDF(34/142 Page) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

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4509 Datasheet, PDF (34/142 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

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4509 Group

q CNTR1 output auto-control circuit operation example 1 (W23 = â1â, W63 = â1â, W62 = â1â)

PWM2 signal

Timer 1 underflow signal

CNTR1 output

Timer 1 start

CNTR1 output start

* When the CNTR1 output auto-control circuit is selected, valid/invalid of CNTR1 output is repeated every timer 1 underflows.

q CNTR1 output auto-control circuit operation example 2 (W23 = â1â, W63 = â1â)

PWM2 signal

Timer 1 underflow signal

Timer 1 start

Timer 1 stop

CNTR1 output

CNTR1 output start

CNTR1 output stop

â When the CNTR1 output auto-control function is not selected while the CNTR output is invalid, CNTR1 output invalid state is retained.

â When the CNTR1 output auto-control function is not selected while the CNTR output is valid, CNTR1 output valid state is retained.

â When the timer 1 is stopped, the CNTR1 output auto-control function becomes invalid.

Fig. 26 CNTR1 output auto-control function by timer 1

Rev.1.02 2006.12.22 page 34 of 140

REJ03B0147-0102

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