一些常用芯片资料，对设计电路很有帮助，好不容易弄到的哦！

ISP升级FLASH程序C51源代码，可将存在EEPROM中的程序烧写在带ISP功能的FLASH内，比如89LS52-FLASH program ISP upgrade C51 source code, could be the existence of the procedure in EEPROM programmer with ISP in function within FLASH, such as 89LS52