TIMER A
7.5 One-shot pulse mode
n = Reload register’s contents
Starts counting.
FFFF16
n
Stops
counting.
Stops counting.
Starts counting.
Reloaded
Reloaded
000116
Time
Set to “1” by software.
➀ Count start bit
➀ Trigger during counting
TAjIN pin
input signal
(1 / fi) ➀➀(n)
(1 / fi) ➀ (n + 1)
One-shot pulse
output from
TAjOUT pin
Timer Aj interrupt
request bit
f
i
: Frequency of count source
n : Reload register’s contents
Cleared to “0” when interrupt request is accepted
or cleared by software.
➀ When the count start bit = “0” (counting stopped), the TAjOUT pin outputs “L” level.
➀ When a trigger is generated during counting, the counter counts the count source (n + 1) times after a new trigger is generated.
Note: The above applies when an external trigger (rising edge of TAjIN pin’s input signal) is selected.
Fig. 7.5.5 Example of operation in one-shot pulse mode (selecting external trigger)
7906 Group User’s Manual Rev.2.0
7-36
RENESAS [ RENESAS TECHNOLOGY CORP ]
