H8S2245 datasheet(461/818 Pages) RENESAS

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Section 12 Serial Communication Interface (SCI)

Rev.3.00 Mar. 26, 2007 Page 419 of 772

REJ09B0355-0300

Bit 4—Framing Error (FER): Indicates that a framing error occurred during reception in

asynchronous mode, causing abnormal termination.

Bit 4

FER

Description

[Clearing condition]

(Initial value)*

When 0 is written to FER after reading FER = 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*

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 clocked 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

Description

[Clearing condition]

(Initial value)*

When 0 is written to PER after reading PER = 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 clocked synchronous mode, serial transmission cannot be continued, either.

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