HD6433937 Datasheet, PDF (157/521 Pages) Hitachi Semiconductor – Hardware Manual

Bits 7, 6, 4, and 3: Reserved bits
Bits 7, 6, 4, and 3 are reserved; they are always read as 1 and cannot be modified.
Bit 5: P2₂/SO₁ pin PMOS control (POF1)
This bit controls the on/off state of the P2₂/SO₁ pin PMOS. This bit should be cleared to 0.
Bit 5
POF1
0
1
Description
CMOS setting
NMOS open-drain setting
(initial value)
Bit 2: P2₂/SO₁ pin function switch (SO1)
This bit selects whether pin P2₂/SO₁ is used as P2₂ or as SO₁.
Bit 2
SO1
0
1
Description
Functions as P2₂ I/O pin
Functions as SO₁ output pin
Bit 1: P2₁/SI₁ pin function switch (SI1)
This bit selects whether pin P2₁/SI₁ is used as P2₁ or as SI₁.
Bit 1
SI1
0
1
Description
Functions as P2₁ I/O pin
Functions as SI₁ input pin
Bit 0: P2₀/SCK₁ pin function switch (SCK1)
This bit selects whether pin P2₀/SCK₁ is used as P2₀ or as SCK₁.
Bit 0
SCK1
0
1
Description
Functions as P2₀ I/O pin
Functions as SCK₁ I/O pin
(initial value)
(initial value)
(initial value)
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