R8C2K datasheet(190/471 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 173 of 450

REJ09B0406-0110

16.2.5.4

Programmable wait one-shot generation mode

The following three workarounds should be performed in programmable wait one-shot generation mode.

(1) To write to registers TRBPRE and TRBPR during count operation (TCSTF bit is set to 1), note the

following points:

• When the TRBPRE register is written continuously, allow three or more cycles of the count source for each

write interval.

• When the TRBPR register is written continuously, allow three or more cycles of the prescaler underflow

for each write interval.

(2) Do not set both the TRBPRE and TRBPR registers to 00h.

(3) Set registers TRBSC and TRBPR using the following procedure.

(a) To use “INT0 pin one-shot trigger enabled” as the count start condition

Set the TRBSC register and then the TRBPR register. At this time, after writing to the TRBPR

INT0 pin.

(b) To use “writing 1 to TOSST bit” as the start condition

Set the TRBSC register, the TRBPR register, and then TOSST bit. At this time, after writing to the

TRBPR register, allow an interval of 0.5 or more cycles of the count source before writing to the

TOSST bit.

R8C2K датащи(PDF) 190 Page - Renesas Technology Corp