Pin Description
Pin Definition
Pin Name
TYPE
DESCRIPTION
Pin Name
RST
1
ID
RST: =
A high duty on this pin keeps for at least 10us plus
36 oscillation cycles will reset the device.
P3.0 (RXD)
2
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: =
P3.1 (TXD)
3
BU
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.
XTALO: =
Output from the inverting oscillator amplifier.
XTALI: =
Input to the inverting oscillator amplifier.
P3.2: =
XTALO
4
5
6
O
I
XTALI
P3.2 (INT0)
BU
General purpose 4-state I/O port with internal pull-up
mechanism; can be configured as open-drain
output.
INT0: =
External interrupt source
P3.3: =
P3.3 (INT1)
7
BU
General purpose 4-state I/O port with internal pull-up
mechanism; can be configured as open-drain
output.
INT1: =
External interrupt source
6
MPC82x52A Data Sheet
MEGAWIN
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