SH7750_08 Datasheet, PDF (746/1162 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

Section 15 Serial Communication Interface (SCI)
Bit 6—Character Length (CHR): Selects 7 or 8 bits as the data length in asynchronous mode. In
synchronous mode, a fixed data length of 8 bits is used regardless of the CHR setting,
Bit 6: CHR
Description
0
8-bit data
(Initial value)
1
7-bit data*
Note: * When 7-bit data is selected, the MSB (bit 7) of SCTDR1 is not transmitted.
Bit 5—Parity Enable (PE): In asynchronous mode, selects whether or not parity bit addition is
performed in transmission, and parity bit checking in reception. In synchronous mode, parity bit
addition and checking is not performed, regardless of the PE bit setting.
Bit 5: PE
Description
0
Parity bit addition and checking disabled
(Initial value)
1
Parity bit addition and checking enabled*
Note: * When the PE bit is set to 1, the parity (even or odd) specified by the O/E bit is added to
transmit data before transmission. In reception, the parity bit is checked for the parity
(even or odd) specified by the O/E bit.
Bit 4—Parity Mode (O/E): Selects either even or odd parity for use in parity addition and
checking. The O/E bit setting is only valid when the PE bit is set to 1, enabling parity bit addition
and checking, in asynchronous mode. The O/E bit setting is invalid in synchronous mode, and
when parity addition and checking is disabled in asynchronous mode.
Bit 4: O/E
Description
0
Even parity^*1
(Initial value)
1
Odd parity^*2
Notes: 1. When even parity is set, parity bit addition is performed in transmission so that the total
number of 1-bits in the transmit character plus the parity bit is even. In reception, a
check is performed to see if the total number of 1-bits in the receive character plus the
parity bit is even.
2. When odd parity is set, parity bit addition is performed in transmission so that the total
number of 1-bits in the transmit character plus the parity bit is odd. In reception, a check
is performed to see if the total number of 1-bits in the receive character plus the parity
bit is odd.
Rev.7.00 Oct. 10, 2008 Page 662 of 1074
REJ09B0366-0700