4524 Datasheet, PDF (42/161 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4524 Group
CNTR1 output auto-control circuit by timer 3 is selected.
q CNTR1 output: valid (W43 = “1”)
CNTR1 output auto-control circuit selected (W61 = “1”)
PWM signal
Timer 3 underflow signal
CNTR1 output
Timer 3 start
CNTR1 output start
q CNTR1 output auto-control function
PWM signal
Timer 3 underflow signal
Timer 3 start
➀
➁
Timer 3 stop
Register W61
➂
CNTR1 output
CNTR1 output start
CNTR1 output stop
➀ When the CNTR1 output auto-control function is set to be invalid while the CNTR1 output is invalid,
the CNTR1 output invalid state is retained.
➁ ^{When the CNTR1 output auto-control function is set to be invalid while the CNTR1 output is valid,}
the CNTR1 output valid state is retained.
➂ When timer 3 is stopped, the CNTR1 output auto-control function becomes invalid.
Note: When the PWM signal is output from C/CNTR1 pin, set the output latch of port C to “0”.
Fig. 28 CNTR1 output auto-control function by timer 3
Rev.2.00 Jul 27, 2004 page 42 of 159
REJ03B0091-0200Z