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Section 10 Serial Communication Interface
10.1
Overview
The H8/3637 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