Renesas H8S/2138 Series Handbuch Seite 124

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Microcomputer Technical Q&A
116
Q&A No.: QAH8S-237
Category: SCI
Subject: SCI Clock Pin Input/Output Setting
Question
When the SCI is used, is the input/output specification for the SCK pin made in the data direction
register (DDR) for the port corresponding to that pin?
Answer
No. When the SCI is used, the SCK pin input/output specification is made with the C/A bit
(communication mode bit) in the serial mode register (SMR) and bits CKE1 and CKE0 (clock
enable) in the serial control register (SCR). A setting is not required in the DDR for the
corresponding port.
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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