我烧写的是Atmega8-16PU的芯片,板子选择的Arduino NG/ATmega8,MAC OS 10.8 64位,Arduino开发工具1.0.1,下载器在我的电脑里识别为USB3.0高速总线-->USBtiny,一直提示:avrdude: error: usbtiny_transmit: usb_control_msg(DeviceRequestTO): unknown error
avrdude: initialization failed, rc=-1
Double check connections and try again, or use -F to override
this check.