HD6433644R datasheet(297/549 Pages) RENESAS

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Section 10 Serial Communication Interface

Rev. 6.00 Sep 12, 2006 page 277 of 526

REJ09B0326-0600

Section 10 Serial Communication Interface

10.1

Overview

The H8/3644 Group is provided with a two-channel serial communication interface (SCI). Table

10.1 summarizes the functions and features of the two SCI channels.

Table 10.1 Serial Communication Interface Functions

Channel

Functions

Features

SCI1

Synchronous serial transfer

• Choice of 8-bit or 16-bit data length

• Continuous clock output

• Choice of 8 internal clocks (φ/1024 to φ/2)

or external clock

• Open drain output possible

• Interrupt requested at completion of

transfer

SCI3

Synchronous serial transfer

• 8-bit data length

• Send, receive, or simultaneous

send/receive

Asynchronous serial transfer

• Multiprocessor communication

• Choice of 7-bit or 8-bit data length

• Choice of 1 or 2 stop bits

• Parity addition

• On-chip baud rate generator

• Receive error detection

• Break detection

• Interrupt requested at completion of

transfer or error

10.2

SCI1

10.2.1

Overview

Serial communication interface 1 (SCI1) performs synchronous serial transfer of 8-bit or 16-bit

data. SSB (Synchronized Serial Bus) communication is also provided, enabling multiple ICs to be

controlled.

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