AT89C52提供的功能有：8K字节的闪速存储器，256字节的内部RAM，32个I/0口线，3个16位定时/计数器，1个6向量两级中断结构，一个全双工串行通信口，片内震荡器及时钟电路，这篇文档都给与了详细的描述。-AT89C52 provides the functions: 8K bytes of Flash memory, 256 bytes of internal RAM, 32 个 I/0 the port, three 16-bit timer/counter, 1 vector 2 6 interrupt structure, a full-duplex serial port, on-chip oscillator and clock circuitry, and this document gave a detailed descr iption.