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Microcomputer Technical Q&A
100
Q&A No.: QAH8S-225
Category: SCI
Subject: SCI Initialization
Question
In SCI initialization, why is there a minimum 1-bit wait before the TE bit or RE bit is set in the
serial control register (SCR)?
Answer
This 1-bit interval is the minimum time necessary for internal processing to fix the data. If
transmission is performed without this 1-bit wait, indefinite data will be transmitted. A wait of at
least 1-bit duration is therefore essential before performing transmission.
Applicable Products
Applicability Series Applicability Series Applicability Series
Yes Entire H8S Series H8S/2655 H8S/2350
H8S/2355 H8S/2357 H8S/2345
H8S/2245 H8S/2148 H8S/2144
H8S/2138 H8S/2134 H8S/2128
H8S/2124
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