HD6432138SW datasheet(453/1061 Pages) RENESAS

453 / 1061 page

Section 15 Serial Communication Interface (SCI, IrDA)

Rev. 4.00 Jun 06, 2006 page 399 of 1004

REJ09B0301-0400

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.

Bit 3—Multiprocessor Interrupt Enable (MPIE): Enables or disables multiprocessor interrupts.

The MPIE bit setting is only valid in asynchronous mode when receiving with the MP bit in SMR

set to 1.

The MPIE bit setting is invalid in synchronous mode or when the MP bit is cleared to 0.

Bit 3

MPIE

Description

Multiprocessor interrupts disabled (normal reception performed)

(Initial value)

[Clearing conditions]

• When the MPIE bit is cleared to 0

• When data with MPB = 1 is received

Multiprocessor interrupts enabled*

Receive interrupt (RXI) requests, receive-error interrupt (ERI) requests, and setting

of the RDRF, FER, and ORER flags in SSR are disabled until data with the

multiprocessor bit set to 1 is received.

Note:

When receive data including MPB = 0 is received, receive data transfer from RSR to

RDR, receive error detection, and setting of the RDRF, FER, and ORER flags in SSR ,

is not performed. When receive data with MPB = 1 is received, the MPB bit in SSR is

set to 1, the MPIE bit is cleared to 0 automatically, and generation of RXI and ERI

interrupts (when the TIE and RIE bits in SCR are set to 1) and FER and ORER flag

setting is enabled.

Bit 2—Transmit End Interrupt Enable (TEIE): Enables or disables transmit-end interrupt

(TEI) request generation if there is no valid transmit data in TDR when the MSB is transmitted.

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