HD404356 Datasheet, PDF (71/100 Pages) Hitachi Semiconductor – 4-bit HMCS400-Series microcomputer

HD404358 Series
Port mode register A (PMRA: $004)
Bit
Initial value
Read/Write
Bit name
3
0
W
PMRA3
2
1
0
0
W
W
PMRA2 PMRA1
0
0
W
PMRA0
PMRA2
0
1
R0₃/TOC Mode Selection
R0₃
TOC
PMRA3
0
1
D₃/BUZZ Mode Selection
D₃
BUZZ
PMRA0
0
1
R0₂/SO Mode Selection
R0₂
SO
PMRA1
0
1
R0₁/SI Mode Selection
R0₁
SI
Figure 60 Port Mode Register A (PMRA)
Miscellaneous Register (MIS: $00C): This register has the following functions (figure 61).
• R0₂/SO pin PMOS control
Miscellaneous register (MIS: $00C) is a 4-bit write-only register and is reset to $0 by MCU reset.
Miscellaneous register (MIS: $00C)
Bit
Initial value
Read/Write
Bit name
3
0
W
MIS3
2
0
W
MIS2
1
0
—
—
—
—
Not used Not used
MIS3
0
1
Pull-Up MOS
On/Off Selection
Pull-up MOS off
Pull-up MOS on
(refer to table 21)
MIS2
0
1
CMOS Buffer
On/Off Selection
for Pin R0₂/SO
PMOS active
PMOS off
Figure 61 Miscellaneous Register (MIS)
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