HD64F3437TF16 Datasheet, PDF (264/752 Pages) Hitachi Semiconductor – 12 V must not be applied to the S-mask model (single-power-supply specification), as this may permanently damage the device.

12.1.3 Input and Output Pins
Table 12.1 lists the input and output pins used by the SCI module.
Table 12.1 SCI Input/Output Pins
Channel Name
Abbreviation I/O
Function
0
Serial clock input/output SCK0
Input/output SCI0 clock input and output
Receive data input
RxD0
Input
SCI0 receive data input
Transmit data output TxD0
Output
SCI0 transmit data output
1
Serial clock input/output SCK1
Input/output SCI1 clock input and output
Receive data input
RxD1
Input
SCI1 receive data input
Transmit data output TxD1
Output
SCI1 transmit data output
Note: In this manual, the channel subscript has been deleted, and only SCK, RxD, and TxD are
used.
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