h8s-2158 Renesas Electronics Corporation., h8s-2158 Datasheet - Page 445
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h8s-2158
Manufacturer Part Number
h8s-2158
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2158.pdf
(927 pages)
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16.3.5
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.
Bit Functions in Normal Serial Communication Interface Mode (When SMIF in SCMR = 0)
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
Section 16 Serial Communication Interface (SCI, IrDA, and CRC)
R/W
R/W
R/W
R/W
R/W
R/W
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 Jan 25, 2006 page 393 of 872
REJ09B0286-0300
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