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SH7708 데이터시트(PDF) 363 Page - Renesas Technology Corp

부품명 SH7708
상세설명  SuperH??RISC engine
PDF  633 Pages
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제조업체  RENESAS [Renesas Technology Corp]
홈페이지  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

SH7708 데이터시트(HTML) 363 Page - Renesas Technology Corp

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13.2.4
Transmit Data Register (SCTDR)
The transmit data register (SCTDR) is an 8-bit register that stores data for serial transmission.
When the SCI detects that the transmit shift register (SCTSR) is empty, it moves transmit data
written in SCTDR into SCTSR and starts serial transmission. Continuous serial transmission is
possible by writing the next transmit data in SCTDR during serial transmission from SCTSR.
The CPU can always read and write to SCTDR. SCTDR is initialized to H'FF by a reset and in
standby or module standby mode.
Bit:
7
6
5
4
3
2
1
0
Bit name:
Initial value:
1
1
1
1
1
1
1
1
R/W:
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
13.2.5
Serial Mode Register (SCSMR)
The serial mode register (SCSMR) is an 8-bit register that specifies the SCI serial communication
format and selects the clock source for the baud rate generator.
The CPU can always read and write to SCSMR. SCSMR is initialized to H'00 by a reset and in
standby or module standby mode.
Bit:
7
6
5
4
3
2
1
0
Bit name:
C/
A
CHR
PE
O/
E
STOP
MP
CKS1
CKS0
Initial value:
0
0
0
0
0
0
0
0
R/W:
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Bit 7—Communication Mode (C/
A): Selects whether the SCI operates in asynchronous or
synchronous mode.
Bit 7: C/
A
Description
0
Asynchronous mode
(Initial value)
1
Synchronous mode



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