R8C2K datasheet(175/471 Pages) RENESAS

номер детали	R8C2K

подробное описание детали	RENESAS MCU R8C FAMILY / R8C/2x SERIES

PDF	471 Pages

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R8C/2K Group, R8C/2L Group

16. Timers

Rev.1.10

Dec 21, 2007

Page 158 of 450

REJ09B0406-0110

16.2.1.1

Timer Write Control during Count Operation

Timer RB has a prescaler and a timer (which counts the prescaler underflows). The prescaler and timer each

consist of a reload register and a counter. In timer mode, the TWRC bit in the TRBMR register can be used to

select whether writing to the prescaler or timer during count operation is performed to both the reload register

and counter or only to the reload register.

However, values are transferred from the reload register to the counter of the prescaler in synchronization with

the count source. In addition, values are transferred from the reload register to the counter of the timer in

synchronization with prescaler underflows. Therefore, even if the TWRC bit is set for writing to both the reload

addition, if the TWRC bit is set for writing to the reload register only, the synchronization of the writing will be

shifted if the prescaler value changes. Figure 16.18 shows an Operating Example of Timer RB when Counter

Value is Rewritten during Count Operation.

R8C2K датащи(PDF) 175 Page - Renesas Technology Corp