H8SLASH3028F datasheet(497/923 Pages) RENESAS

497 / 923 page

Rev. 2.00, 09/03, page 467 of 890

Bit 5—Overrun Error (ORER): Indicates that data reception ended abnormally due to an

overrun error.

Bit 5

ORER

Description

Receiving is in progress or has ended normally*

(Initial value)

[Clearing conditions]

• The chip is reset or enters standby mode

• Read ORER when ORER = 1, then write 0 in ORER

A receive overrun error occurred*

[Setting condition]

Reception of the next serial data ends when RDRF = 1

Notes: 1. Clearing the RE bit to 0 in SCR does not affect the ORER flag, which retains its

previous value.

2. RDR continues to hold the receive data prior to the overrun error, so subsequent

receive data is lost. Serial receiving cannot continue while the ORER flag is set to 1. In

synchronous mode, serial transmitting is also disabled.

Bit 4—Framing Error (FER)/Error Signal Status (ERS): The function of this bit differs for the

normal serial communication interface and for the smart card interface. Its function is switched

with the SMIF bit in SCMR.

For serial communication interface (SMIF bit in SCMR cleared to 0): Indicates that data

reception ended abnormally due to a framing error in asynchronous mode.

Bit 4

FER

Description

Receiving is in progress or has ended normally*

(Initial value)

[Clearing conditions]

• The chip is reset or enters standby mode

• Read FER when FER = 1, then write 0 in FER

A receive framing error occurred*

[Setting condition]

The stop bit at the end of the receive data is checked and found to be 0

Notes: 1. Clearing the RE bit to 0 in SCR does not affect the FER flag, which retains its previous

value.

2. When the stop bit length is 2 bits, only the first bit is checked. The second stop bit is

not checked. When a framing error occurs the SCI transfers the receive data into RDR

but does not set the RDRF flag. Serial receiving cannot continue while the FER flag is

set to 1. In synchronous mode, serial transmitting is also disabled.

H8/3028F Datasheet(PDF) 497 Page - Renesas Technology Corp