Feature:

• Simultaneously compatible with AT, STC series microcontroller (support chip: STC89C52 STC12C5A60S2 STC11/10x series AT89S52 and chip compatible with the above chip pins).
• Single chip microcomputer 40 IO all pin out, with self-locking switch, can easily switch power on and off.
• With LED power supply lamp indication.
• 3.5mm*1.3mm can be connected to the external power supply seat.
• The pin leads 3 way VCC and GND, which can input or output power.
• The pull resistance of P0 has been pulled up.
• With Resistance capacity and manual reset circuit.
• Support ISP downloads and serial download programs.
• Integrated ISP 10P download interface, easy to download AT89S52 microcontroller.
• Below the crystal oscillator is the circular hole socket, convenient replacement crystal oscillator (default matches 11.0592M).
• Support for 2 power input modes: DC power seat (matching seat 3.5mm*1.3mm) and single pin (next to the power switch).
• With 1pc programmable LED, which can do LED experiments.

Specification:

• Working voltage: DC 5V
• Color: Green
• Size: 8.9x3.8cm/3.5x1.49'
• Weight: About 50g

Package : 

1 x Module