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R8C/2G 数据表(PDF) 201 Page - Renesas Technology Corp

部件名 R8C/2G
功能描述  RENESAS MCU R8C FAMILY / R8C/2x SERIES
PDF  344 Pages
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制造商  RENESAS [Renesas Technology Corp]
网页  http://www.renesas.com
标志 RENESAS - Renesas Technology Corp

R8C/2G 数据表(HTML) 201 Page - Renesas Technology Corp

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R8C/2G Group
17. Timers
Rev.1.00
Apr 04, 2008
Page 181 of 318
REJ09B0387-0100
17.2.5.4
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
register, allow an interval of 0.5 or more cycles of the count source before trigger input from the
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.



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