Datasheet

Section 13 Serial Communication Interface (SCI)
Rev. 3.00 Sep. 28, 2009 Page 251 of 710
REJ09B0384-0300
Section 13 Serial Communication Interface (SCI)
This LSI has two independent serial communication interface (SCI) channels. The SCI can handle
both asynchronous and clock synchronous serial communication. Asynchronous serial data
communication can be carried out with standard asynchronous communication chips such as a
Universal Asynchronous Receiver/Transmitter (UART) or Asynchronous Communication
Interface Adapter (ACIA). A function is also provided for serial communication between
processors (multiprocessor communication function). The SCI also supports the smart card (IC
card) interface based on ISO/IEC 7816-3 (Identification Card) as an enhanced asynchronous
communication function.
13.1 Features
• Choice of asynchronous or clock synchronous serial communication mode
• 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.
• On-chip baud rate generator allows any bit rate to be selected
The external clock can be selected as a transfer clock source (except for the smart card
interface).
• Choice of LSB-first or MSB-first transfer (except in the case of asynchronous mode 7-bit data)
• Four interrupt sources
Four interrupt sources ⎯ transmit-end, transmit-data-empty, receive-data-full, and receive
error ⎯ that can issue requests.
The transmit-data-empty and receive-data-full interrupt sources can activate DTC.
• Module stop mode availability