SH79F166APSLASH044PR datasheet(74/113 Pages) SINOWEALTH

74 / 113 page

SH79F166A

Programming Note:

(1) Set PWMLO register to 55H and select the PWM module system clock.

(2) Set the PWM period/duty cycle by writing proper value to the PWM period control register (PWMP) or PWM duty control

(3) Select the PWM output mode of the duty cycle by writing the PWM0S bit in the PWM control register (PWMC).

(4) In order to output the desired PWM waveform, enable the PWM module by writing “1” to the EPWM bit in the PWM control

(5) If the PWM period cycle or duty cycle is to be changed, the writing flow should be followed as described in step b or step c.

Then the revised data are loaded into the re-load counter and the PWM module starts counting at next period.

(6) Change the data in PWMLO register not equal to 55h in order to enhance the anti-noise ability.

PWMn clock t

PWM

01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 01 02 03 04 05 06 07 08

Write [PPn.11, PPn.0] = 0DH

Write [PDn.11, PDn.0] = 07H

PWMn output

(PWMnS = 0)

Period cycle = 0FH x t

PWM

Duty cycle

= 06H x t

PWM

Period cycle = 0DH x t

PWM

Duty cycle

= 06H x t

PWM

Duty cycle

= 07H x t

PWM

n = 0 or 1

PWM output Period or Duty cycle changing example

8.3.5 PWM01

Generally, PWM01 have a 180∘phase delay with PWM0 as shown below when there is no dead time inserted. It is

automatically generated by hardware when EPWM01 in PWM timer enable register is set.

PWM0 output

(PWM0S = 0)

PWM01 output

(PWM0S = 0)

Note:

(1) That even if PWM0 are not enabled, PWM01 can also work if enabled.

(2) If EFLT is set, When a valid event occurs on FLT pin, PWM01 and PWM0 are both LOW (PWMS = 0)or both HIGH (PWMS

= 1).

SH79F166AP/044PR 데이터시트(PDF) 74 Page - SINOWEALTH Electronic Ltd

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