HD64F38024HV Datasheet, PDF (265/684 Pages) Renesas Technology Corp – Hardware Manual Renesas 8-Bit Single-Chip Microcomputer H8 Family/H8/300L Super Low Power Series

Section 8 I/O Ports
8.12.2 Register Configuration and Descriptions
Table 8.31 shows the registers used by the input/output data inversion function.
Table 8.31 Register Configuration
Name
Serial port control register
Abbr.
SPCR
R/W
Address
R/W
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 7 and 6 are reserved; they are always read as 1 and cannot be modified.
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 4 is reserved; it can only be written with 0.
Rev. 8.00 Mar. 09, 2010 Page 243 of 658
REJ09B0042-0800