SH7052 datasheet(476/919 Pages) RENESAS

476 / 919 page

450

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

The MPIE setting is used only in asynchronous mode, and only if the multiprocessor mode bit

(MP) in the serial mode register (SMR) is set to 1 during reception. The MPIE setting is

ignored in synchronous mode or when the MP bit is cleared to 0.

Bit 3: MPIE

Description

Multiprocessor interrupts are disabled (normal receive operation)

(Initial value)

[Clearing conditions]

• When the MPIE bit is cleared to 0

• When data with MPB = 1 is received

Multiprocessor interrupts are enabled. Receive-data-full interrupt

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

RDRF, FER, and ORER status flags in the serial status register (SSR)

are disabled until data with the multiprocessor bit set to 1 is received.

The SCI does not transfer receive data from RSR to RDR, does not

detect receive errors, and does not set the RDRF, FER, and ORER

flags in the serial status register (SSR). When it receives data that

includes MPB = 1, MPB is set to 1, and the SCI automatically clears

MPIE to 0, generates RXI and ERI interrupts (if the TIE and RIE bits in

SCR are set to 1), and allows the FER and ORER bits to be set.

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

(TEI) requested if TDR does not contain valid transmit data when the MSB is transmitted.

Bit 2: TEIE

Description

Transmit-end interrupt (TEI) requests are disabled*

(Initial value)

Transmit-end interrupt (TEI) requests are enabled*

Note: * The TEI request can be cleared by reading the TDRE bit in the serial status register (SSR)

after it has been set to 1, then clearing TDRE to 0 and clearing the transmit end (TEND) bit

to 0; or by clearing the TEIE bit to 0.

SH7052 Datasheet(PDF) 476 Page - Renesas Technology Corp