HD6433802H Datasheet, PDF (186/435 Pages) Hitachi Semiconductor – Single-Chip Microcomputer

8.11 Input/Output Data Inversion Function
8.11.1 Overview
With input pin RXD₃₂ and output pin TXD₃₂, the data can be handled in inverted form.
SCINV2
P4₁/RXD₃₂
RXD₃₂
SCINV3
P4₂/TXD₃₂
TXD₃₂
Figure 8.10 Input/Output Data Inversion Function
8.11.2 Register Configuration and Descriptions
Table 8.28 shows the registers used by the input/output data inversion function.
Table 8.28 Register Configuration
Name
Serial port control register
Abbreviation R/W
SPCR
R/W
Address
H'FF91
Serial Port Control Register (SPCR)
Bit
7
—
Initial value
1
Read/Write
—
6
5
4
3
2
1
0
— SPC32 — SCINV3 SCINV2 —
—
1
0
—
0
0
—
—
—
R/W
W
R/W R/W
W
W
SPCR is an 8-bit readable/writable register that performs RXD₃₂ and TXD₃₂ pin input/output data
inversion switching.
Bits 7 and 6: Reserved bits
Bits 7 and 6 are reserved; they are always read as 1 and cannot be modified.
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