40P lock 51 MCU minimum system board development board support AT89C51/S52 STC89C52

40P lock 51 MCU minimum system board development board support AT89C51 / S52 STC89C52 description: 1.IO mouth all leads, the classic 51 minimum system, eliminating the need for welding trouble 2. Integrated ISP 10P download interface, easy to download AT89S52 microcontroller. 3 welded round hole socket, easy to change the crystal (default is 11.0592M) 4. Support chip: STC89C52 STC12C5A60S2 STC11 / 10x series AT89S52 and above pin compatible chip 5. A power switch to facilitate the experiment. 6. Power input 2: DC-005 Power Block (support for 5.5 * 2.1) and single-row pin (near the power switch) 7. External expansion of 3 VCC, GND, as shown on the line pin. 8. P0 port with pull-up resistor. 9. Reset mode: Power-on reset and external reset button. 10. Using green IC lock seat, easy to replace the chip. 11. We develop and produce, long-term supply stability. 13. board size: 4.1cm * 8.9cm manifest: 1, as shown in the finished welding plate