HD6417750 Datasheet, PDF (718/1039 Pages) Renesas Technology Corp – SuperH RISC engine

Bits 15 to 8, 2, and 0—Reserved: These bits are always read as 0, and should only be written
with 0.
Bit 7—Transmit Interrupt Enable (TIE): Enables or disables transmit-FIFO-data-empty
interrupt (TXI) request generation when serial transmit data is transferred from SCFTDR2 to
SCTSR2, the number of data bytes in the transmit FIFO register falls to or below the transmit
trigger set number, and the TDFE flag in the serial status register (SCFSR2) is set to 1.
Bit 7: TIE
Description
0
Transmit-FIFO-data-empty interrupt (TXI) request disabled* (Initial value)
1
Transmit-FIFO-data-empty interrupt (TXI) request enabled
Note: * TXI interrupt requests can be cleared by writing transmit data exceeding the transmit trigger
set number to SCFTDR2 after reading 1 from the TDFE flag, then clearing it to 0, or by
clearing the TIE bit to 0.
Bit 6—Receive Interrupt Enable (RIE): Enables or disables generation of a receive-data-full
interrupt (RXI) request when the RDF flag or DR flag in SCFSR2 is set to 1, a receive-error
interrupt (ERI) request when the ER flag in SCFSR2 is set to 1, and a break interrupt (BRI)
request when the BRK flag in SCFSR2 or the ORER flag in SCLSR2 is set to 1.
Bit 6: RIE
Description
0
Receive-data-full interrupt (RXI) request, receive-error interrupt (ERI)
request, and break interrupt (BRI) request disabled*
(Initial value)
1
Receive-data-full interrupt (RXI) request, receive-error interrupt (ERI)
request, and break interrupt (BRI) request enabled
Note: * An RXI interrupt request can be cleared by reading 1 from the RDF or DR flag, then
clearing the flag to 0, or by clearing the RIE bit to 0. ERI and BRI interrupt requests can be
cleared by reading 1 from the ER, BRK, or ORER flag, then clearing the flag to 0, or by
clearing the RIE and REIE bits to 0.
Bit 5—Transmit Enable (TE): Enables or disables the start of serial transmission by the SCIF.
Bit 5: TE
Description
0
Transmission disabled
(Initial value)
1
Transmission enabled*
Note: * Serial transmission is started when transmit data is written to SCFTDR2 in this state.
Serial mode register (SCSMR2) and FIFO control register (SCFCR2) settings must be
made, the transmission format decided, and the transmit FIFO reset, before the TE bit is set
to 1.
Rev. 6.0, 07/02, page 666 of 986