你能使用除错器下载软件到目标机并直接运行。
Using a debugger you can download software to the target for immediate execution.
除错器在宿主机上运行并且通过串口或网络连接到目标机上。
The debugger runs on a host computer and connects to the target through a serial port or network connection.
它一般被放在ROM中，通过串口或网路与除错器进行通讯。
It usually resides in ROM and communicates with a debugger via a serial port or network connection.
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