HD64F7045F28V Datasheet, PDF (513/925 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7040 Series

The CPU cannot read or write the TSR directly.
Bit: 7
6
5
4
3
2
1
0
R/W: —
—
—
—
—
—
—
—
14.2.4 Transmit Data Register (TDR)
The transmit data register (TDR) is an 8-bit register that stores data for serial transmission. When
the SCI detects that the transmit shift register (TSR) is empty, it moves transmit data written in the
TDR into the TSR and starts serial transmission. Continuous serial transmission is possible by
writing the next transmit data in the TDR during serial transmission from the TSR.
The CPU can always read and write the TDR. The TDR is initialized to H'FF by a power-on reset
or in standby mode. Manual reset does not initialize TDR.
Bit: 7
6
5
4
3
2
1
0
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
14.2.5 Serial Mode Register (SMR)
The serial mode register (SMR) 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 the SMR. The SMR is initialized to H'00 by a power-on reset
or in standby mode. Manual reset does not initialize SMR.
Bit: 7
C/A
Initial value: 0
R/W: R/W
6
5
CHR
PE
0
0
R/W R/W
4
3
2
1
0
O/E STOP MP CKS1 CKS0
0
0
0
0
0
R/W R/W R/W R/W R/W
473