Datasheet

Section 12 Serial Communication Interface
Rev.7.00 Dec. 24, 2008 Page 375 of 698
REJ09B0074-0700
• Smart Card Interface Mode (When SMIF in SCMR is 1)
Bit Bit Name Initial Value R/W Description
7 TIE 0 R/W Transmit Interrupt Enable
When this bit is set to 1, TXI interrupt request is enabled.
TXI interrupt request cancellation can be performed by
reading 1 from the TDRE flag in SSR, then clearing it to
0, or clearing the TIE bit to 0.
6 RIE 0 R/W Receive Interrupt Enable
When this bit is set to 1, RXI and ERI interrupt requests
are enabled.
RXI and ERI interrupt request cancellation can be
performed by reading 1 from the RDRF, FER, PER, or
ORER flag in SSR, then clearing the flag to 0, or clearing
the RIE bit to 0.
5 TE 0 R/W Transmit Enable
When this bit s set to 1, transmission is enabled.
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 transfer
format before setting the TE bit to 1. When this bit is
cleared to 0, the transmission operation is disabled, and
the TDRE flag is fixed at 1.
4 RE 0 R/W Receive Enable
When this bit is set to 1, reception is enabled.
Serial reception is started in this state when a start bit is
detected in asynchronous mode or serial clock input is
detected in clocked synchronous mode.
SMR setting must be performed to decide the reception
format before setting the RE bit to 1.
Clearing the RE bit to 0 does not affect the RDRF,
FER,PER, and ORER flags, which retain their states.