Datasheet

Section 12 Serial Communication Interface
Rev.7.00 Dec. 24, 2008 Page 441 of 698
REJ09B0074-0700
12.9.2 Interrupts in Smart Card Interface Mode
Table 12.13 shows the interrupt sources in Smart Card interface mode. The transmit end interrupt
(TEI) request cannot be used in this mode.
Note: In case of block transfer mode, see section 12.9.1, Interrupts in Normal Serial
Communication Interface Mode.
Table 12.13 Interrupt Sources in Smart Card Interface Mode
Channel Name Interrupt Source Interrupt Flag
DMAC
Activation Priority*
ERI0 Receive Error, detection ORER, PER, ERS Not possible High
RXI0 Receive Data Full RDRF Possible
0
TXI0 Transmit Data Empty TEND Possible
2 ERI2 Receive Error, detection ORER, PER, ERS Not possible
RXI2 Receive Data Full RDRF Not possible
TXI2 Transmit Data Empty TEND Not possible Low
Note: * Indicates the initial state immediately after a reset.
Priorities in channels can be changed by the interrupt controller.
12.10 Usage Notes
12.10.1 Module Stop Mode Setting
SCI operation can be disabled or enabled using the module stop control register. The initial setting
is for SCI operation to be halted. Register access is enabled by clearing module stop mode. For
details, refer to section 20, Power-Down Modes.
12.10.2 Break Detection and Processing (Asynchronous Mode Only)
When framing error detection is performed, a break can be detected by reading the RxD pin value
directly. In a break, the input from the RxD pin becomes all 0s, setting the FER flag, and possibly
the PER flag. Note that as the SCI continues the receive operation after receiving a break, even if
the FER flag is cleared to 0, it will be set to 1 again.