HD643303x Hitachi, HD643303x Datasheet - Page 240

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HD643303x

Manufacturer Part Number
HD643303x
Description
Hitachi Microcomputer
Manufacturer
Hitachi
Datasheet
Figure 8-30 shows examples of the output of PWM waveforms with duty cycles of 0% and 100%.
If the counter is cleared by compare match with GRB, and GRA is set to a higher value than GRB,
the duty cycle is 0%. If the counter is cleared by compare match with GRA, and GRB is set to a
higher value than GRA, the duty cycle is 100%.
GRB
GRA
H'0000
TIOCA
GRA
GRB
H'0000
TIOCA
TCNT value
TCNT value
Figure 8-30 PWM Mode (Example 2)
Write to GRA
Write to GRB
b. 100% duty cycle
Counter cleared by compare match with GRB
Counter cleared by compare match with GRA
a. 0% duty cycle
225
Write to GRA
Write to GRB
Time
Time

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