Datasheet

Section 15 Serial Communication Interface (SCI, IrDA)
Rev. 4.00 Jun 06, 2006 page 398 of 1004
REJ09B0301-0400
Bit 7—Transmit Interrupt Enable (TIE): Enables or disables transmit-data-empty interrupt
(TXI) request generation when serial transmit data is transferred from TDR to TSR and the TDRE
flag in SSR is set to 1.
Bit 7
TIE Description
0 Transmit-data-empty interrupt (TXI) request disabled
*
(Initial value
)
1 Transmit-data-empty interrupt (TXI) request enabled
Note: * TXI interrupt request cancellation can be performed by reading 1 from the TDRE flag,
then clearing it to 0, or clearing the TIE bit to 0.
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
0 Receive-data-full interrupt (RXI) request and receive-error interrupt (ERI) request
disabled
*
(Initial value
)
1 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
TE Description
0 Transmission disabled
*
1
(Initial value
)
1 Transmission enabled
*
2
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.