Datasheet

Section 14 Serial Communication Interface 3 (SCI3)

Rev. 4.00 Mar. 15, 2006 Page 251 of 556

REJ09B0026-0400

Section 14 Serial Communication Interface 3 (SCI3)

This LSI includes a serial communication interface 3 (SCI3), which has two independent

channels*

. The SCI3 can handle both asynchronous and clocked synchronous serial

communication. In asynchronous mode, serial data communication can be carried out using

standard asynchronous communication chips such as a Universal Asynchronous

Receiver/Transmitter (UART) or an Asynchronous Communication Interface Adapter (ACIA). A

function is also provided for serial communication between processors (multiprocessor

communication function).

Table 14.1 shows the SCI3 channel configuration and figure 14.1 shows a block diagram of the

SCI3. Since pin functions are identical for each of the two channels (SCI3 and SCI3_2*

), separate

explanations are not given in this section.

Notes: 1. Only one channel is available in the H8/36037 Group.

2. The H8/36037 Group does not have the SCI3_2.

14.1 Features

• Choice of asynchronous or clocked 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

• External clock or on-chip baud rate generator can be selected as a transfer clock source.

• Six interrupt sources

Transmit-end, transmit-data-empty, receive-data-full, overrun error, framing error, and parity

error.

Asynchronous mode

• Data length: 7 or 8 bits

• Stop bit length: 1 or 2 bits

• Parity: Even, odd, or none

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