M16C65 Datasheet, PDF (382/829 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M16C/60

Under development
M16C/65 Group
Preliminary Specification
This is a preliminary specification and is subject to change.
18. Timer B
18.3 Operations
18.3.1 Common Operations
18.3.1.1 Operating Clock
The count source for each timer acts as a clock, controlling such timer operations as counting and
reloading.
18.3.1.2 Counter Reload Timing
Timer Bi starts counting from the value (n) set in the TBi register. The TBi register consists of a counter
and a reload register. The counter starts decrementing the count source from n, reloads a value in the
reload register at the next count source after the value becomes 0000h, and continues decrementing.
The value written in the TBi register takes effect in the counter and the reload register at the timings
below.
• When the count is stopped
• Between the count starts and the first count source is input
A value written to the TBi register is immediately written to the counter and the reload register.
• After the count starts and the first count source is input
A value written to the TBi register is immediately written to the reload register.
The counter continues counting and reloads the value in the reload register at the next count
source after the value becomes 0000h.
REJ09B0484-0030 Rev.0.30 Sep 09, 2008
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