
432
Serial data communication can be carried out with other chips that have a synchronous
communication function
One serial data transfer format
Data length
: 8 bits
Receive error detection : Overrun errors detected
SCI select function (SCI0: TxD0 = high-impedance and SCK0 = fixed high-level input can
be selected when
IRQ7 = 1)
Full-duplex communication capability
The transmitter and receiver are mutually independent, enabling transmission and reception
to be executed simultaneously
Double-buffering is used in both the transmitter and the receiver, enabling continuous
transmission and continuous reception of serial data
Choice of LSB-first or MSB-first transfer
Can be selected regardless of the communication mode* (except in the case of
asynchronous mode 7-bit data)
Note: * Descriptions in this section refer to LSB-first transfer.
On-chip baud rate generator allows any bit rate to be selected
Choice of serial clock source: internal clock from baud rate generator or external clock from
SCK pin
Four interrupt sources
Four interrupt sources — transmit-data-empty, transmit-end, receive-data-full, and receive
error — that can issue requests independently
The transmit-data-empty interrupt and receive data full interrupts can activate the data
transfer controller (DTC) or DMA controller (DMAC) to execute data transfer
Module stop mode can be set
As the initial setting, SCI operation is halted. Register access is enabled by exiting module
stop mode.