HD6473847RHV Datasheet, PDF (221/546 Pages) Renesas Technology Corp – Renesas 8-Bit Single-Chip Microcomputer H8 Family / H8/300L Super Low Power Series

Section 8 I/O Ports
8.2.2 Port Control Register 4 (PCR4)
PCR4 controls whether each of the port 4 pins functions as an input pin or output pin.
Bit
7 to 3
2
1
0
Bit Name
⎯
Initial
Value
All 1
PCR42 0
PCR41 0
PCR40 0
R/W Description
⎯
Reserved
These bits are always read as 1.
W
Setting a PCR4 bit to 1 makes the corresponding pin an
W
output pin, while clearing the bit to 0 makes the pin an
input pin. The settings in PCR4 and in PDR4 are valid
W
only when the corresponding pin is designated in SCR3
and SCR2 as a general I/O pin.
PCR4 is a write-only register. Bits 2 to 0 are always
read as 1.
8.2.3 Serial Port Control Register (SPCR)
SPCR performs input/output data inversion switching of the RXD32 and TXD32 pins. Figure 8.3
shows the configuration.
P41/RXD32
SCINV2
RXD32
SCINV3
P42/TXD32
TXD32
Figure 8.3 Input/Output Data Inversion Function
Rev. 7.00 Mar. 08, 2010 Page 189 of 510
REJ09B0024-0700