Datasheet

Section 13 Serial Communication Interface (SCI)

Rev. 3.00 Sep. 28, 2009 Page 310 of 710

REJ09B0384-0300

Table 13.12 SCI Interrupt Sources

Channel Name Interrupt Source Interrupt Flag DTC Activation Priority

ERI1 Receive error ORER, FER, PER Not possible High

RXI1 Receive data full RDRF Possible

TXI1 Transmit data empty TDRE Possible

TEI1 Transmit end TEND Not possible

ERI3 Receive error ORER, FER, PER Not possible

RXI3 Receive data full RDRF Possible

TXI3 Transmit data empty TDRE Possible

TEI3 Transmit end TEND Not possible Low

13.8.2 Interrupts in Smart Card Interface Mode

Table 13.13 shows the interrupt sources in smart card interface mode. A TEI interrupt request

cannot be used in this mode.

Table 13.13 SCI Interrupt Sources

Channel Name Interrupt Source Interrupt Flag DTC Activation Priority

ERI1 Receive error, error

signal detection

ORER, PER, ERS Not possible High

RXI1 Receive data full RDRF Possible

TXI1 Transmit data empty TEND Possible

ERI3 Receive error, error

signal detection

ORER, PER, ERS Not possible 3

RXI3 Receive data full RDRF Possible

TXI3 Transmit data empty TEND Possible Low

Data transmission/reception using the DTC is also possible in smart card interface mode, similar

to in the normal SCI mode. In transmission, the TEND and TDRE flags in SSR are simultaneously

set to 1, thus generating a TXI interrupt request. This activates the DTC by a TXI interrupt request

thus allowing transfer of transmit data if the TXI interrupt request is specified as a source of DTC

activation beforehand. The TDRE and TEND flags are automatically cleared to 0 at data transfer

by the DTC. If an error occurs, the SCI automatically re-transmits the same data. During re-

transmission, the TEND flag remains as 0, thus not activating the DTC. Therefore, the SCI and

DTC automatically transmit the specified number of bytes, including re-transmission in the case of