Ecloud Shop Minimum Systerm STC MCU Development Board 51 Board for STC89C52 / STC12C5A60S2 Product Name: 51 STC microcontroller minimum system board; Number of Pins: 40; System: Classic 51 smallest single-chip system Crystal: 11.0592M; supported chip: STC89C52, STC12C5A60S2, STC11 / 10x series, AT89S52; Power Jack: DC-005 External power supply: DC 5V;