HD404449 Datasheet, PDF (92/123 Pages) Hitachi Semiconductor – HD404449 SERIES

HD404449 Series
Port Mode Register A (PMRA: $004): This register has the following functions (figure 75).
• R4₂/SI₁ pin function selection
• R4₃/SO₁ pin function selection
• R5₂/SI₂ pin function selection
• R5₃/SO₂ pin function selection
Port mode register A (PMRA: $004) is a 4-bit write-only register, and is reset to $0 by MCU reset.
Port mode register A (PMRA: $004)
Bit
Initial value
Read/Write
Bit name
3
2
1
0
0
0
0
0
W
W
W
W
PMRA3 PMRA2 PMRA1 PMRA0
PMRA0
0
1
R4₃/SO₁ mode selection
R4₃
SO₁
PMRA1
0
1
R4₂/SI₁ mode selection
R4₂
SI₁
PMRA2
0
1
R5₃/SO₂ mode selection
R5₃
SO₂
PMRA3
0
1
R5₂/SI₂ mode selection
R5₂
SI₂
Figure 75 Port Mode Register A (PMRA)
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