Renesas H8S/2318 series, Hardware Manual

Page: 368 / 1121

Rev. 5.00, 12/03, page 338 of 1088
Figure 9-8 illustrates periodic counter operation.
TCNT value
TGR
H'0000
CST bit
TGF
Time
Counter cleared by TGR
compare match
Flag cleared by software or
DTC activation
Figure 9-8 Periodic Counter Operation
Waveform Output by Compare Match: The TPU can perform 0, 1, or toggle output from the
corresponding output pin using compare match.
•
Example of setting procedure for waveform output by compare match
Figure 9-9 shows an example of the setting procedure for waveform output by compare match
Select waveform output mode
Output selection
Set output timing
Start count
<Waveform output>
[1]
[2]
[3]
[1] Select initial value 0 output or 1 output, and
compare match output value 0 output, 1 output,
or toggle output, by means of TIOR. The set
initial value is output at the TIOC pin until the
first compare match occurs.
[2] Set the timing for compare match generation in
TGR.
[3] Set the CST bit in TSTR to 1 to start the count
operation.
Figure 9-9 Example of Setting Procedure for Waveform Output by Compare Match