UPD784026 Renesas Electronics Corporation., UPD784026 Datasheet - Page 409

• Manufacturer Part Number: UPD784026
• Description: 16/8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

13.3 PWM OUTPUT UNIT OPERATION
13.3.1 Basic PWM Output Operation
1) as shown below.
f
PWM signal 16 times.
cycle is controlled in accordance with the value of bits 4 to 7 of the PWMn to implement a PWM pulse signal once every
16 cycles.
CLK
The PWM pulse output duty is determined by the value set in bits 4 to 15 of the PWM modulo register (PWMn: n = 0,
PWM pulse output duty =
The PWM pulse output repetition frequency is the frequency obtained by division-by-256 of the PWM clock f
In PWM pulse output, 12-bit resolution is achieved by repeating output of a f
The addition of extra pulses (1/f
* 8-bit resolution per PWM pulse cycle
/4 set by the PWM prescaler register (PWPR) (=f
PWM Signal
(
Value of PWMn bits
PWMC
Figure 13-4 Basic PWM Output Operation
) to the 8-bit resolution PWM pulses determined by bits 8 to 15 of the PWMn every
* 16
*
CHAPTER 13 PWM OUTPUT UNIT
4096
(Value of PWMn bits 4 to 15)
4
One 12-Bit PWM Signal Cycle
PWMC
to
15
/256), and the minimum pulse width is 1/f
) *
1
PWMC
4095
/256 repetition frequency 8-bit resolution
PWMC
.
CLK
/1 to
369