R5F61525 RENESAS [Renesas Technology Corp], R5F61525 Datasheet - Page 420

• Manufacturer Part Number: R5F61525
• Description: 32-Bit CISC Microcomputer H8SX Family H8SX/1500 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 12 Serial Communication Interface (SCI)
12.3.4
TSR is a shift register that transmits serial data. To perform serial data transmission, the SCI first
automatically transfers transmit data from TDR to TSR, then sends the data to the TxD pin. TSR
cannot be directly accessed by the CPU.
12.3.5
SMR is used to set the SCI's serial transfer format and select the baud rate generator clock source.
Some bits in SMR have different functions in normal mode and smart card interface mode.
• When SMIF in SCMR = 0
• When SMIF in SCMR = 1
Bit Functions in Normal Serial Communication Interface Mode (When SMIF in SCMR = 0):
Rev. 3.00 Mar. 14, 2006 Page 382 of 804
REJ09B0104-0300
Bit
7
6
Bit
Bit Name
Initial Value
R/W
Bit
Bit Name
Initial Value
R/W
Bit Name
C/A
CHR
Transmit Shift Register (TSR)
Serial Mode Register (SMR)
R/W
R/W
C/A
GM
7
0
7
0
Initial
Value
0
0
CHR
R/W
R/W
BLK
6
0
6
0
R/W
R/W
R/W
R/W
R/W
PE
PE
5
0
5
0
Description
Communication Mode
0: Asynchronous mode
1: Clocked synchronous mode
Character Length (valid only in asynchronous mode)
0: Selects 8 bits as the data length.
1: Selects 7 bits as the data length. LSB-first is fixed and
In clocked synchronous mode, a fixed data length of 8
bits is used.
the MSB (bit 7) in TDR is not transmitted in
transmission.
R/W
R/W
O/E
O/E
4
0
4
0
STOP
BCP1
R/W
R/W
3
0
3
0
BCP0
R/W
R/W
MP
2
0
2
0
CKS1
CKS1
R/W
R/W
1
0
1
0
CKS0
CKS0
R/W
R/W
0
0
0
0