Pin Description
Pin Definition
Pin Name
P2.2
PIN NUMBER
PLCC-32 PDIP-28 PDIP-20
TYPE
BU
DESCRIPTION
P2.2:
=
General purpose 4-state I/O port with
internal pull-up mechanism; can be
configured as open-drain output.
P2.3:
=
General purpose 4-state I/O port with
internal pull-up mechanism; can be
configured as open-drain output.
RST:
=
A high duty on this pin keeps for at
least 10us plus 36 oscillation cycles
will reset the device.
P3.0:
=
General purpose 4-state I/O port with
internal pull-up mechanism; can be
configured as open-drain output.
RXD:
=
Data Receiving pin for built-in UART
functionality.
P3.1:
=
General purpose 4-state I/O port with
internal pull-up mechanism; can be
configured as open-drain output.
TXD:
=
Data Transmitting pin for built-in
UART functionality.
P0.0:
=
General purpose 4-state I/O port with
internal pull-up mechanism; can be
configured as open-drain output.
XTALO: =
Output from the inverting oscillator
amplifier.
XTALI:
=
Input to
amplifier.
the
inverting
oscillator
1
1
P2.3
2
2
BU
RST
3
3
1
ID
P3.0 (RXD)
4
4
2
BU
P3.1 (TXD)
5
5
3
BU
P0.0
6
BU
XTALO
7
6
4
O
XTALI
8
7
5
I
P3.2 (INT0)
9
8
6
BU
P3.2:
=
General purpose 4-state I/O port with
internal pull-up mechanism; can be
configured as open-drain output.
INT0:
=
External interrupt source
6
MPC82x54A Data Sheet
MEGAWIN
MEGAWIN [ MEGAWIN TECHNOLOGY CO., LTD ]
