HD6473887 Datasheet, PDF (158/523 Pages) Renesas Technology Corp – Hitachi Single-Chip Microcomputer

1. Port data register 2 (PDR2)
Bit
Initial value
Read/Write
7
P2₇
0
R/W
6
P2₆
0
R/W
5
P2₅
0
R/W
4
P2₄
0
R/W
3
P2₃
0
R/W
2
P2₂
0
R/W
1
P2₁
0
R/W
0
P2₀
0
R/W
PDR2 is an 8-bit register that stores data for port 2 pins P2₇ to P2₀. If port 2 is read while PCR2
bits are set to 1, the values stored in PDR2 are read, regardless of the actual pin states. If port 2 is
read while PCR2 bits are cleared to 0, the pin states are read.
Upon reset, PDR2 is initialized to H'00.
2. Port control register 2 (PCR2)
Bit
Initial value
Read/Write
7
PCR2₇
0
W
6
PCR2₆
0
W
5
PCR2₅
0
W
4
PCR2₄
0
W
3
PCR2₃
0
W
2
PCR2₂
0
W
1
PCR2₁
0
W
0
PCR2₀
0
W
PCR2 is an 8-bit register for controlling whether each of the port 2 pins P2₇ to P2₀ functions as an
input pin or output pin. Setting a PCR2 bit to 1 makes the corresponding pin an output pin, while
clearing the bit to 0 makes the pin an input pin. The settings in PCR2 and PDR2 are valid only
when the corresponding pin is designated in PMR1 as a general I/O pin.
Upon reset, PCR2 is initialized to H'00.
PCR2 is a write-only register, which is always read as all 1s.
3. Port mode register 2 (PMR2)
Bit
7
6
5
4
—
Initial value
1
Read/Write
—
—
POF1
—
1
0
1
—
R/W
—
3
2
1
0
—
SO1
SI1 SCK1
1
0
0
0
—
R/W R/W R/W
PMR2 is an 8-bit read/write register that controls the selection of pin functions for port 2 pins P2₀,
P2₁, and P2₃, and the PMOS on/off state for the P2₂/SO₁ pin.
Upon reset, PMR2 is initialized to H'D8.
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