W79E4051_VS_AT89S4051 的重要介绍技术文档。-W79E4051_VS_AT89S4051 important introductory technical documentation.

华邦单片机的用户说明书，里面有详尽的数据手册，便于开发。-datasheet of windbond mcu(79e). Port bits are defined inside. It is useful when you are developing.

W79E4051是快速51处理器，并内置eeprom，指令系统完同51指令集兼容-W79E4051 51 processor is fast and built-in eeprom, instruction complete instruction set is compatible with the 51