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Section 19 Serial Communication Interface with FIFO
19.1
Overview
This LSI has a three-channel serial communication interface with FIFO (SCIF) that supports both
asynchronous and clock synchronous serial communication. It also has 16-stage FIFO registers for
both transmission and reception independently for each channel that enable this LSI to perform
efficient high-speed continuous communication.
19.1.1
Features
• Asynchronous serial communication:
Serial data communication is performed by start-stop in character units. The SCIF can
communicate with a universal asynchronous receiver/transmitter (UART), an asynchronous
communication interface adapter (ACIA), or any other communications chip that employs
a standard asynchronous serial system. There are eight selectable serial data
communication formats.
Data length: 7 or 8 bits
Stop bit length: 1 or 2 bits
Parity: Even, odd, or none
Receive error detection: Parity, framing, and overrun errors
Break detection: Break is detected when a framing error is followed by at least one frame at
the space 0 level (low level). It is also detected by reading the RxD level directly from the
port data register when a framing error occurs.
• Synchronous mode:
Serial data communication is synchronized with a clock signal. The SCIF can communicate
with other chips having a synchronous communication function. There is one serial data
communication format.
Data length: 8 bits
Receive error detection: Overrun errors
• Full duplex communication: The transmitting and receiving sections are independent, so the
SCIF can transmit and receive simultaneously. Both sections use 16-stage FIFO buffering, so
high-speed continuous data transfer is possible in both the transmit and receive directions.
• On-chip baud rate generator with selectable bit rates
Section 19 Serial Communication Interface with FIFO (SCIF)
(SCIF)
Rev. 4.00 Sep. 14, 2005 Page 685 of 982
REJ09B0023-0400
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