3825_03 Datasheet, PDF (121/339 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCOMPUTER

APPLICATION
2.3 Timer X and timer Y
Pulse width
Pulse width H(s) = 1 ÷ count source frequency ! (the Y counter initial value – the Y counter value immediately
before reload)
Operation example in pulse width HL continuously measurement mode
•RL : Reload
•n : The Y counter initial value
•m : The Y counter value immediately before reload
Timer Y stop
control bit
Count
source
P55/CNTR1 pin
CNTR1 active
RL
RL
RL
edge switch bit
n16
m16
000016
CNTR1 interrupt
request bit
CNTR1 interrupt
enable bit
Timer Y interrupt
request bit
Timer Y interrupt
enable bit
H
H
Time
1
1
1
1 : •Clearing by writing “0” to the CNTR1 interrupt request bit.
•Clearing by accepting the CNTR1 interrupt request when the CNTR1 interrupt enable
bit is “1.”
Fig. 2.3.9 Pulse width HL continuously measurement mode operation example
3825 GROUP USER’S MANUAL
2–49