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CHAPTER 14 16-BIT RELOAD TIMER (WITH EVENT COUNT FUNCTION)
14.5
Output Pin Functions of 16-bit Reload Timer
In reload mode, the TOT pin performs toggle output (inverts at each underflow). In one-
shot mode, the TOT pin functions as a pulse output that shows a particular level while
the count is in progress.
■ Output Pin Functions of 16-bit Reload Timer
The OUTL bit of the control register sets the output polarity. When OUTL = 0, the initial value for toggle
output is "0" and the one-shot pulse output is "1" while the count is in progress. The output waveforms are
opposite when OUTL = 1.
Figure 14.5-1 and Figure 14.5-2 show the output pin function of 16-bit reload timer (1).
Underflow
TOT
OUTE
CNTE
Trigger
Underflow
TOT
OUTE
CNTE
Trigger
234
Figure 14.5-1 Output Pin Function of 16-bit Reload Timer (1)
Count start
General-purpose port
[RELD=1,OUTL=0]
Figure 14.5-2 Output Pin Function of 16-bit Reload Timer (2)
Level is opposite
when OUTL = 1
General-purpose port
[RELD=1,OUTL=0]
Level is opposite when
OUTL = 1
Waiting for a trigger
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