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前者主要是基于接口的直接设置编写：he communication between the USB interface adapter and the host PC is via USB, while the communication between the USB interface adapter and the slave device(s) is via an inter-integrated circuit (I²C), SMBus, PMBus and/or general-purpose inputs/outputs GPIOs.
后者是基于闪存芯片的系统内编程：tandalone In-System Programmer for Flash-based microcontrollers and serial memories. FlashRunnerTM FR03
