HD6432142 datasheet(478/1177 Pages) RENESAS

478 / 1177 page

Section 15 Serial Communication Interface (SCI, IrDA)

Rev. 4.00 Sep 27, 2006 page 434 of 1130

REJ09B0327-0400

Bit 6—Receive Interrupt Enable (RIE): Enables or disables receive-data-full interrupt (RXI)

request and receive-error interrupt (ERI) request generation when serial receive data is transferred

from RSR to RDR and the RDRF flag in SSR is set to 1.

Bit 6

RIE

Description

Receive-data-full interrupt (RXI) request and receive-error interrupt (ERI) request

disabled*

(Initial value)

Receive-data-full interrupt (RXI) request and receive-error interrupt (ERI) request

enabled

Note:

RXI and ERI interrupt request cancellation can be performed by reading 1 from the

RDRF, FER, PER, or ORER flag, then clearing the flag to 0, or clearing the RIE bit to 0.

Bit 5—Transmit Enable (TE): Enables or disables the start of serial transmission by the SCI.

Bit 5

Description

Transmission disabled*

(Initial value)

Transmission enabled*

Notes: 1. The TDRE flag in SSR is fixed at 1.

2. In this state, serial transmission is started when transmit data is written to TDR and the

TDRE flag in SSR is cleared to 0.

SMR setting must be performed to decide the transmission format before setting the TE

bit to 1.

Bit 4—Receive Enable (RE): Enables or disables the start of serial reception by the SCI.

Bit 4

Description

Reception disabled*

(Initial value)

Reception enabled*

Notes: 1. Clearing the RE bit to 0 does not affect the RDRF, FER, PER, and ORER flags, which

retain their states.

2. Serial reception is started in this state when a start bit is detected in asynchronous

mode or serial clock input is detected in synchronous mode.

SMR setting must be performed to decide the reception format before setting the RE bit

to 1.

HD6432142 Datasheet(PDF) 478 Page - Renesas Technology Corp