HD6417751 Datasheet, PDF (339/1105 Pages) Renesas Technology Corp – SuperH RISC engine

Operation selection
Select count clock ₁
Underflow interrupt
generation setting
2
When input capture
function is used
Input capture interrupt ₃
generation setting
Timer constant
register setting
4
Set initial timer
counter value
5
Start count
6
Note: When an interrupt is generated, clear the source flag in the interrupt handler. If the interrupt
enabled state is set without clearing the flag, another interrupt will be generated.
Figure 12.2 Example of Count Operation Setting Procedure
Auto-Reload Count Operation: Figure 12.3 shows the TCNT auto-reload operation.
TCNT value
TCOR
TCOR value set in TCNT
on underflow
H'00000000
STR0–STR4
UNF
Time
Figure 12.3 TCNT Auto-Reload Operation
Rev. 3.0, 04/02, page 299 of 1064