4518 Datasheet, PDF (42/160 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4518 Group
q CNTR1 output: invalid (W43 = “0”)
Timer 4 count source
Timer 4 count value
(Reload
register)
Timer 4 underflow signal
0316 0216 0116 0016 0316 0216 0116 0016 0316 0216 0116 0016 0316 0216 0116 0016 0316 0216 0116 0016
(R4L)
(R4L)
(R4L)
(R4L)
(R4L)
PWM signal (output invalid)
Timer 4 start
PWM signal “L”
fixed
q CNTR1 output: valid (W43 = “1”)
PWM signal “H” interval extension function: invalid (W42 = “0”)
Timer 4 count source
Timer 4 count value
(Reload
register)
Timer 4 underflow signal
0316 0216 0116 0016 0216 0116 0016 0316 0216 0116 0016 0216 0116 0016 0316 0216 0116 0016 0216 0116
(R4L)
(R4H)
(R4L)
(R4H)
(R4L)
(R4H)
PWM
signal
Timer 4 start
3 clock
PWM period 7 clock
3 clock
PWM period 7 clock
q CNTR1 output: valid (W43 = “1”)
PWM signal “H” interval extension function: valid (W42 = “1”) (Note)
Timer 4 count source
Timer 4 count value
(Reload
register)
Timer 4 underflow signal
0316 0216 0116 0016 0216 0116 0016 0316 0216 0116 0016 0216 0116 0016 0316 0216 0116 0016 0216
(R4L)
(R4H)
(R4L)
(R4H)
(R4L)
(R4H)
PWM
signal
Timer 4 start
3.5 clock
PWM period 7.5 clock
3.5 clock
PWM period 7.5 clock
Note: At PWM signal “H” interval extension function: valid, set “0116” or more to reload register R4H.
Fig. 31 Timer 4 operation (reload register R4L: “0316”, R4H: “0216”)
Rev.3.01 2005.06.15 page 42 of 157
REJ03B0008-0301