D12320VF25V Datasheet, PDF (481/1146 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 12 Serial Communication Interface (SCI)
Bit 4—Framing Error (FER): Indicates that a framing error occurred during reception in
asynchronous mode, causing abnormal termination.
Bit 4
FER
0
Description
[Clearing condition]
(Initial value)^*1
When 0 is written to FER after reading FER = 1
1
[Setting condition]
When the SCI checks the stop bit at the end of the receive data when reception ends,
and the stop bit is 0 ^*2
Notes: 1. The FER flag is not affected and retains its previous state when the RE bit in SCR is
cleared to 0.
2. In 2-stop-bit mode, only the first stop bit is checked for a value of 0; the second stop bit
is not checked. If a framing error occurs, the receive data is transferred to RDR but the
RDRF flag is not set. Also, subsequent serial reception cannot be continued while the
FER flag is set to 1. In synchronous mode, serial transmission cannot be continued,
either.
Bit 3—Parity Error (PER): Indicates that a parity error occurred during reception using parity
addition in asynchronous mode, causing abnormal termination.
Bit 3
PER
0
Description
[Clearing condition]
(Initial value)^*1
When 0 is written to PER after reading PER = 1
1
[Setting condition]
When, in reception, the number of 1 bits in the receive data plus the parity bit does not
match the parity setting (even or odd) specified by the O/E bit in SMR^*2
Notes: 1. The PER flag is not affected and retains its previous state when the RE bit in SCR is
cleared to 0.
2. If a parity error occurs, the receive data is transferred to RDR but the RDRF flag is not
set. Also, subsequent serial reception cannot be continued while the PER flag is set to
1. In synchronous mode, serial transmission cannot be continued, either.
Rev.7.00 Feb. 14, 2007 page 447 of 1108
REJ09B0089-0700