stc单片机具有在应用编程，这是他的AD和EEPROM，已经调试过。调试起来比较方便；带有10位AD；内部eeprom；可在1T/机器周期下工作，速度是传统51单片机的12倍.-STC has a single-chip In-Application Programming, which is his AD and EEPROM, have been debug. Debugging is more convenient　with 10 AD　internal eeprom　can 1T/machine cycle to work, speed is a traditional single-chip microcomputer 51 of 12 times.