HD6433635SW datasheet(236/418 Pages) RENESAS

236 / 418 page

222

10.3

SCI3

10.3.1

Overview

Serial communication interface 3 (SCI3) has both synchronous and asynchronous serial data

communication capabilities. It also has a multiprocessor communication function for serial data

communication among two or more processors.

Features: SCI3 features are listed below.

• Selection of asynchronous or synchronous mode

 Asynchronous mode

Serial data communication is performed using the asynchronous method, in which

synchronization is achieved character by character.

SCI3 can communicate with a UART (universal asynchronous receiver/transmitter), ACIA

(asynchronous communication interface adapter), or other chip that employs standard

asynchronous serial communication. It can also communicate with two or more other

processors using the multiprocessor communication function. There are twelve selectable

serial data communication formats.

• Data length: seven or eight bits

• Stop bit length: one or two bits

• Parity: even, odd, or none

• Multiprocessor bit: one or none

• Receive error detection: parity, overrun, and framing errors

• Break detection: by reading the RXD level directly when a framing error occurs

 Synchronous mode

Serial data communication is synchronized with a clock signal. SCI3 can communicate

with other chips having a clocked synchronous communication function.

• Data length: eight bits

• Receive error detection: overrun errors

• Full duplex communication

The transmitting and receiving sections are independent, so SCI3 can transmit and receive

simultaneously. Both sections use double buffering, so continuous data transfer is possible in

both the transmit and receive directions.

• Built-in baud rate generator with selectable bit rates.

• Internal or external clock may be selected as the transfer clock source.

• There are six interrupt sources: transmit end, transmit data register empty, receive data register

full, overrun error, framing error, and parity error.

HD6433635SW Datasheet(PDF) 236 Page - Renesas Technology Corp