HD6473847RHV Datasheet, PDF (214/546 Pages) Renesas Technology Corp – Renesas 8-Bit Single-Chip Microcomputer H8 Family / H8/300L Super Low Power Series

Section 8 I/O Ports
8.1.1 Port Data Register 3 (PDR3)
PDR3 is a register that stores data of port 3.
Initial
Bit
Bit Name Value R/W Description
7
P37
0
6
P36
0
5
P35
0
4
P34
0
R/W If port 3 is read while PCR3 bits are set to 1, the values
R/W ^{stored in PDR3 are read, regardless of the actual pin}
states. If port 3 is read while PCR3 bits are cleared to 0,
R/W _{the pin states are read.}
R/W
3
P33
0
R/W
2
P32
0
R/W
1
P31
0
R/W
0
⎯
⎯
⎯
Reserved
8.1.2 Port Control Register 3 (PCR3)
PCR3 controls whether each of the port 3 pins functions as an input pin or output pin.
Initial
Bit
Bit Name Value R/W Description
7
PCR37 0
6
PCR36 0
5
PCR35 0
4
PCR34 0
3
PCR33 0
2
PCR32 0
W
Setting a PCR3 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 PCR3 and in PDR3 are valid
W
only when the corresponding pin is designated in PMR3
W
as a general I/O pin.
W
PCR3 is a write-only register. Bits 7 to 1 are always read
W
as 1.
1
PCR31 0
W
0
⎯
⎯
W
Reserved
The write value should always be 0.
Rev. 7.00 Mar. 08, 2010 Page 182 of 510
REJ09B0024-0700