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R8C2K 데이터시트(PDF) 448 Page - Renesas Technology Corp

부품명 R8C2K
상세설명  RENESAS MCU R8C FAMILY / R8C/2x SERIES
PDF  471 Pages
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제조업체  RENESAS [Renesas Technology Corp]
홈페이지  http://www.renesas.com
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R8C2K 데이터시트(HTML) 448 Page - Renesas Technology Corp

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R8C/2K Group, R8C/2L Group
23. Usage Notes
Rev.1.10
Dec 21, 2007
Page 431 of 450
REJ09B0406-0110
23.3.2.4
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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