4571 datasheet(34/126 Pages) RENESAS

34 / 126 page

Rev.1.02

May 25, 2007

Page 34 of 124

REJ03B0179-0102

4571 Group

Fig 34. Timer 3 operation example

Timer 3 count source

Timer 3 start

Timer 3 count value

(Reload register)

Timer 3 underflow signal

PWM signal

0216 0116 0016 0316 0216 0116 0016 0316 0216 0116 0016 0316 0216 0116 0016 0316 0216 0116 0016

0316

(R3L)

PWM1 signal “L” fixed

- CNTR1 pin output invalid (W33=0)

Timer 3 count source

Timer 3 start

Timer 3 count value

(Reload register)

Timer 3 underflow signal

PWM signal

0216 0116 0016 0216 0116 0016 0316 0216 0116 0016 0216 0116 0016 0316 0216 0116 0016 0216 0116

0316

(R3L)

(R3H)

(R3L)

(R3H)

(R3L)

(R3H)

PWM period 7 clock

* : “0316” is set to reload register R3L and “02 16” is set to reload register R3H.

4 clock

3 clock

4 clock

3 clock

4 clock

Timer 3 count source

Timer 3 start

Timer 3 count value

(Reload register)

Timer 3 underflow signal

PWM signal

0216 0116 0016

0216

0116 0016 0316 0216 0116 0016

0216

0116 0016 0316 0216 0116 0016 0216

0316

(R3L)

(R3H)

(R3L)

(R3H)

(R3L)

(R3H)

PWM period 7.5 clock

4 clock

3.5 clock

4 clock

3.5 clock

4 clock

Note: When the PWM signal “H” interval expansion function is valid,

set “1” or more to reload register R3H.

- CNTR1 pin output valid (W33=1), PWM signal “H” interval expansion function invalid (W32=0)

- CNTR1 pin output valid (W33=1), PWM signal “H” interval expansion function valid (W32=1) (Note)

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