HD6433802H Datasheet, PDF (187/435 Pages) Hitachi Semiconductor – Single-Chip Microcomputer

Bit 5: P4₂/TXD₃₂ pin function switch (SPC32)
This bit selects whether pin P4₂/TXD₃₂ is used as P4₂ or as TXD₃₂.
Bit 5
SPC32
Description
0
Functions as P4₂ I/O pin
1
Functions as TXD₃₂ output pin*
Note: * Set the TE bit in SCR3 after setting this bit to 1.
(initial value)
Bit 4: Reserved bit
Bit 4 is reserved; only 0 can be written to this bit.
Bit 3: TXD₃₂ pin output data inversion switch
Bit 3 specifies whether or not TXD₃₂ pin output data is to be inverted.
Bit 3
SCINV3
0
1
Description
TXD₃₂ output data is not inverted
TXD₃₂ output data is inverted
(initial value)
Bit 2: RXD₃₂ pin input data inversion switch
Bit 2 specifies whether or not RXD₃₂ pin input data is to be inverted.
Bit 2
SCINV2
0
1
Description
RXD₃₂ input data is not inverted
RXD₃₂ input data is inverted
(initial value)
Bits 1 and 0: Reserved bits
Bits 1 and 0 are reserved; only 0 can be written to these bits.
8.11.3 Note on Modification of Serial Port Control Register
When a serial port control register is modified, the data being input or output up to that point is
inverted immediately after the modification, and an invalid data change is input or output. When
modifying a serial port control register, do so in a state in which data changes are invalidated.
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