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Section 10 Serial Communication Interface

10.1

Overview

The H8/3637S Series is provided with a two-channel serial communication interface (SCI), SCI1

and SCI3. 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 (ø/1024 to ø/2)

or external clock

• Open drain output possible

• Interrupt requested at completion of

transfer

SCI3

Synchronous serial transfer

• 8-bit data transfer

• Send, receive, or simultaneous

send/receive

Asynchronous serial transfer

• Multiprocessor communication

function

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

• Choice of 1-bit or 2-bit stop bit

length

• Odd or even parity

• Built-in 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.

Features: Features of SCI1 are given below.

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

• Choice of eight internal clock sources (ø/1024, ø/256, ø/64, ø/32, ø/16, ø/8, ø/4, ø/2) or an

external clock

• Interrupt requested at completion of transfer

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