PCB board size: 3.9cm * 8.9cm
1. 32 IO pin .
2. Classic the S51 minimum system, eliminating the need for welding trouble
3. Crystal: default 11.0592 Mhz crystal
4. Support chips: AT89s51, AT89s52
5. Power supply: power adapter connector power supply or external
expansion pin power supply (not support ISP download interface powered)
6. DC-005 power seat ( supporting transposon is 5.5 * 2.1 )
7. To expand outside the 4-way VCC, GND, as shown in the pin shown
8. Reset: power-on reset button reset
9. Power indicator (D1) and the program run indicator (D2)
10. Standard ISP download interface.