SH7727 Datasheet, PDF (564/1109 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7700 Series

Section 17 Serial Communication Interface (SCI)
Bit 7—Transmit Interrupt Enable (TIE): Enables or disables the transmit-data-empty interrupt
(TXI) requested when the transmit data register empty bit (TDRE) in the serial status register
(SCSSR) is set to 1 due to transfer of serial transmit data from the SCTDR to the SCTSR.
Bit 7: TIE
Description
0
Transmit-data-empty interrupt request (TXI) is disabled*
(Initial value)
1
Transmit-data-empty interrupt request (TXI) is enabled
Note: * The TXI interrupt request can be cleared by reading TDRE after it has been set to 1, then
clearing TDRE to 0, or by clearing TIE to 0.
Bit 6—Receive Interrupt Enable (RIE): Enables or disables the receive-data-full interrupt (RXI)
requested when the receive data register full bit (RDRF) in the serial status register (SCSSR) is set
to 1 due to transfer of serial receive data from the SCRSR to the SCRDR. It also enables or
disables receive-error interrupt (ERI) requests.
Bit 6: RIE
Description
0
Receive-data-full interrupt (RXI) and receive-error interrupt (ERI) requests are
disabled*
(Initial value)
1
Receive-data-full interrupt (RXI) and receive-error interrupt (ERI) requests are
enabled
Note: * RXI and ERI interrupt requests can be cleared by reading the RDRF flag or error flag
(FER, PER, or ORER) after it has been set to 1, then clearing the flag to 0, or by clearing
RIE to 0.
Bit 5—Transmit Enable (TE): Enables or disables the SCI serial transmitter.
Bit 5: TE
Description
0
Transmitter disabled^*1
(Initial value).
1
Transmitter enabled^*2
Notes: 1. The transmit data register empty bit (TDRE) in the serial status register (SCSSR) is
fixed to 1.
2. Serial transmission starts when the transmit data register empty (TDRE) bit in the serial
status register (SCSSR) is cleared to 0 after writing of transmit data into the SCTDR.
Select the transmit format in the SCSMR before setting TE to 1.
Bit 4—Receive Enable (RE): Enables or disables the SCI serial receiver.
Rev. 5.00 Dec 12, 2005 page 492 of 1034
REJ09B0254-0500