SH7670 Datasheet, PDF (949/1292 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7670 Series

Section 22 Serial Communication Interface with FIFO (SCIF)
Section 22 Serial Communication Interface with FIFO
(SCIF)
This LSI has a three-channel serial communication interface with FIFO (SCIF) that supports both
asynchronous and clocked 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.
22.1 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
serial port register when a framing error occurs.
• Clocked synchronous serial communication:
 Serial data communication is synchronized with a clock signal. The SCIF can communicate
with other chips having a clocked 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
• Internal or external transmit/receive clock source: From either baud rate generator (internal) or
SCK pin (external)
Rev. 1.00 Nov. 14, 2007 Page 923 of 1262
REJ09B0437-0100