4509 Datasheet, PDF (33/142 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4509 Group
q PWM1 function invalid (W13 = “0”)
Timer 1 count source
Timer 1 count value
(Reload register)
Timer 1 underflow signal
0316 0216 0116 0016 0316 0216 0116 0016 0316 0216 0116 0016 0316 0216 0116 0016 0316 0216 0116 0016
(R1L)
(R1L)
(R1L)
(R1L)
(R1L)
PWM1 signal
Timer 1 start
q PWM1 function valid (W13 = “1”)
PWM1 signal “L” fixed
Timer 1 count source
Timer 1 count value
(Reload register)
Timer 1 underflow signal
PWM1 signal
0316 0216 0116 0016 0216 0116 0016 0316 0216 0116 0016 0216 0116 0016 0316 0216 0116 0016 0216 0116
(R1L)
(R1H)
(R1L)
(R1H)
(R1L)
(R1H)
4 clock
Timer 1 start
3 clock
4 clock
PWM period 7 clock
3 clock
4 clock
PWM period 7 clock
Fig. 25 Timer 1 operation example
* : “0316” is set to reload register R1L and “0216” is set to reload register R1H.
Rev.1.02 2006.12.22 page 33 of 140
REJ03B0147-0102