AT89S51单片机的芯片手册 可使用，学习学习，做些小玩意 Features •CompatiblewithMCS®-51Products •4KBytesofIn-SystemProgrammable(ISP)FlashMemory –Endurance:10,000Write/EraseCycles •4.0Vto5.5VOperatingRange •FullyStaticOperation:0Hzto33MHz •Three-levelProgramMemoryLock •128x8-bitInternalR