h8s-2161b Renesas Electronics Corporation., h8s-2161b Datasheet - Page 417

• Manufacturer Part Number: h8s-2161b
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

15.3.5
SMR is used to set the SCI’s serial transfer format and select the on-chip baud rate generator clock
source.
Bit
7
6
5
4
3
Bit Name
C/A
CHR
PE
O/E
STOP
Serial Mode Register (SMR)
Initial Value
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
Section 15 Serial Communication Interface (SCI and IrDA)
Description
Communication Mode
0: Asynchronous mode
1: Clocked synchronous mode
Character Length (enabled only in asynchronous
mode)
0: Selects 8 bits as the data length.
1: Selects 7 bits as the data length. LSB-first is fixed
In clocked synchronous mode, a fixed data length of 8
bits is used.
Parity Enable (enabled only in asynchronous mode)
When this bit is set to 1, the parity bit is added to
transmit data before transmission, and the parity bit is
checked in reception. For a multiprocessor format,
parity bit addition and checking are not performed
regardless of the PE bit setting.
Parity Mode (enabled only when the PE bit is 1 in
asynchronous mode)
0: Selects even parity.
1: Selects odd parity.
Stop Bit Length (enabled only in asynchronous mode)
Selects the stop bit length in transmission.
0: 1 stop bit
1: 2 stop bits
In reception, only the first stop bit is checked. If the
second stop bit is 0, it is treated as the start bit of the
next transmit frame.
and the MSB of TDR is not transmitted in
transmission.
Rev. 3.00 Mar 21, 2006 page 363 of 788
REJ09B0300-0300