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