hd64338023s Renesas Electronics Corporation., hd64338023s Datasheet - Page 283

• Manufacturer Part Number: hd64338023s
• Description: Renesas 8-bit Single-chip Microcomputer Super Low Power Series
• Manufacturer: Renesas Electronics Corporation.

8.12.2
Table 8.31 shows the registers used by the input/output data inversion function.
Table 8.31 Register Configuration
Name
Serial port control register
Serial Port Control Register (SPCR)
SPCR is an 8-bit readable/writable register that performs RXD
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—P4
This bit selects whether pin P4
Bit 5
SPC32
0
1
Note: * Set the TE bit in SCR3 after setting this bit to 1.
Bit 4—Reserved
Bit 4 is reserved; it can only be written with 0.
Bit
Initial value
Read/Write
Register Configuration and Descriptions
2
/TXD
Description
Functions as P4
Functions as TXD
32
Pin Function Switch (SPC32)


7
1
2
2


6
1
/TXD
I/O pin
32
output pin *
32
SPC32
R/W
is used as P4
Abbr.
SPCR
5
0


W
4
2
or as TXD
SCINV3
Rev. 7.00 Mar 10, 2005 page 241 of 652
R/W
R/W
R/W
3
0
32
32
and TXD
.
SCINV2
R/W
Address
H'FF91
2
0
32
pin input/output data
Section 8 I/O Ports
REJ09B0042-0700


W
1
(initial value)


W
0