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R8C2K 데이터시트(PDF) 453 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
Logo RENESAS - Renesas Technology Corp

R8C2K 데이터시트(HTML) 453 Page - Renesas Technology Corp

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R8C/2K Group, R8C/2L Group
23. Usage Notes
Rev.1.10
Dec 21, 2007
Page 436 of 450
REJ09B0406-0110
• The TRD1 register counts 1, 0, FFFFh, 0, 1, in that order, when changing from decrement to increment
operation.
The UDF bit is set to 1 when changing between 1, 0, and FFFFh operation. Also, when bits CMD1 to CMD0
in the TRDFCR register are set to 10b (complementary PWM mode, buffer data transferred at underflow in
the TRD1 register), the content in the buffer registers (TRDGRD0, TRDGRC1, and TRDGRD1) is transferred
to the general registers (TRDGRB0, TRDGRA1, and TRDGRB1). During FFFFh, 0, 1 operation, data are not
transferred to registers such as the TRDGRB0 register. Also, at this time, the OVF bit remains unchanged.
Figure 23.5
Operation when TRD1 Register Underflows in Complementary PWM Mode
No change
UDF bit in
TRDSR0 register
Transferred from
buffer register
TRDGRB0 register
TRDGRA1 register
TRDGRB1 register
Count value in TRD0
register
Set to 0 by a program
Not transferred from buffer register
When bits CMD1 to CMD0 in the
TRDFCR register are set to 10b
(transfer from the buffer register to the
general register when the TRD1 register
underflows).
OVF bit in
TRDSR0 register
FFFFh
1
0
1
0
0
1



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