HD404344R Datasheet, PDF (73/102 Pages) Renesas Technology Corp – 4-bit microcomputer has an A/D converter

HD404344R Series/HD404394 Series
Port Mode Register A (PMRA: 004): This register A has the following functions:
• R0₁/SI pin function selection
• R0₂/SO pin function selection
Port mode register A is a three-bit write-only register and reset to 0 by an MCU reset, as listed in figure 50.
Port mode register A (PMRA: $004)
Bit
Initial value
Read/Write
Bit name
3
2
1
0
—
0
0
0
—
W
W
W
Not used PMRA2 PMRA1 PMRA0
PMRA2
0
1
R0₃/TOC Mode Selection
R0₃
TOC
PMRA0
0
1
R0₂/SO Mode Selection
R0₂
SO
PMRA1
0
1
R0₁/SI Mode Selection
R0₁
SI
Figure 50 Port Mode Register A (PMRA)
Miscellaneous Register
The miscellaneous register (MIS: $00C) has the following functions:
• Control of R0₂/SO pin PMOS
• Pull-up MOS on/off selection
It is a two-bit write-only register and is reset to $0 by an MCU reset, as listed in figure 51.
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