W79E217A Datasheet, PDF (109/207 Pages) Winbond – 8-bit Microcontroller

Preliminary W79E217A Data Sheet
OPOL (Option Bit)
PWM Initial State
Low
0
High
1
C
0
PWMoB
1
Note: o = 1,3,5,7
PWMoEN
0
PWM Output (PWM1,3,5,7)
1
In Brake Condition
Figure 14-8: Odd PWM Output
14.4 Complementary PWM with Dead-time and Override functions
In this module there are four duty-cycle generators, from 0 through 3. The total of eight PWM output
pins in this module, from 0 through 7. The eight PWM outputs are grouped into output pairs of even
and odd numbered outputs. In complimentary modes, the odd PWM pins must always be the
complement of the corresponding even PWM pin. For example, PWM1 will be the complement of
PWM0. PWM3 will be the complement of PWM2, PWM5 will be the complement of PWM4 and PWM7
will be the complement of PWM6. Complementary mode is enabled only when both PWMeEN and the
corresponding PWMoEN are set to high. The time base for the PWM module is provided by its own
12-bit timer, which also incorporates selectable prescaler options.
Note: PWM pairs of (PWM2, 3), (PWM4, 5) and (PWM6, 7) are in the same structure as pair of
(PWM0, 1). (Refer to Figure 14-9).
Figure 14-9: Complementary PWM with Dead-time and Override functions
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Publication Release Date: December 14, 2007
Revision A3.0