SH7014 Datasheet, PDF (681/754 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

Appendix A On-Chip Supporting Module Registers
SCI
Serial Mode Register (SMR)
H'FFFF81A0 (Channel 0)
8/16
H'FFFF81B0 (Channel 1)
Item
Bit name
Initial value
R/W
7
C/A
0
R/W
6
CHR
0
R/W
5
PE
0
R/W
Bit
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
Bit
Name
Value
Description
7
Communication Mode (C/A)
0 Asynchronous mode
(initial value)
1 Clocked synchronous mode
6
Character Length (CHR)
0 Eight-bit data
(initial value)
1
Seven-bit data*¹
5
Parity Enable (PE)
0 Parity bit not added or checked
(initial value)
1 Parity bit added and checked*²
4
Parity Mode (O/E)
0
Even parity*³
(initial value)
1
Odd parity*⁴
3
Stop Bit Length (STOP)
0
One stop bit*⁵
(initial value)
1
Two stop bits*⁶
2
Multiprocessor Mode (MP)
0 Multiprocessor function disabled
(initial value)
1 Multiprocessor format selected
1, 0 Clock Select 1 and 0
(CKS1 and CKS0)
0 0φ
1 φ/4
(initial value)
1 0 φ/16
1 φ/64
Notes: 1. When 7-bit data is selected, the MSB (bit 7) of the transmit data register is not transmitted.
2. When PE is set to 1, an even or odd parity bit is added to transmit data, depending on the parity
mode (O/E) setting. Receive data parity is checked according to the even/odd (O/E) mode setting.
3. If even parity is selected, the parity bit is added to transmit data to make an even number of 1s in
the transmitted character and parity bit combined. Receive data is checked to see if it has an even
number of 1s in the received character and parity bit combined.
4. If odd parity is selected, the parity bit is added to transmit data to make an odd number of 1s in the
transmitted character and parity bit combined. Receive data is checked to see if it has an odd
number of 1s in the received character and parity bit combined.
5. In transmitting, a single bit of 1 is added at the end of each transmitted character.
6. In transmitting, two bits of 1 are added at the end of each transmitted character.
Rev.5.00 Sep. 27, 2007 Page 647 of 716
REJ09B0398-0500