HD64F2638F20J Datasheet, PDF (402/1512 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series

Section 10 16-Bit Timer Pulse Unit (TPU)
H8S/2639, H8S/2638, H8S/2636,
H8S/2630, H8S/2635 Group
Figure 10-8 illustrates periodic counter operation.
TCNT value
TGR
Counter cleared by TGR
compare match
H'0000
Time
CST bit
TGF
Flag cleared by software or
DTC activation
Figure 10-8 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 10-9 shows an example of the setting procedure for waveform output by compare match
Output selection
Select waveform output mode [1]
Set output timing
[2]
[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.
Start count operation
[3]
<Waveform output>
Figure 10-9 Example of Setting Procedure for Waveform Output by Compare Match
Page 352 of 1458
REJ09B0103-0800 Rev. 8.00
May 28, 2010