W79E225A_08 Datasheet, PDF (109/203 Pages) Winbond – 8-bit Microcontroller

Preliminary W79E225A/226A/227A Data Sheet
Note that if a narrow pulse on the Brake Pin causes brake to be asserted, it may not be possible to go
through the above code before the end of the pulse. In this case, in addition to the code shown, an
external latch on the Brake Pin may be required to ensure that there is a smooth transition in going
from brake to run. A compare value greater than the counter reloaded value resulted in the PWM
output being high. In addition there are two special cases. A compare value of all zeroes, 000H,
causes the output to remain permanently Low. A compare value of all ones, FFFH, results in the PWM
output remaining permanently High.
Figure 14-2: PWM Time-base Generator and Brake Function
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Publication Release Date: April 15, 2008
Revision A4.0