Description:Applicable to WIN 8.1/8/7/XP 32-bit/64-bit system computer.The product can be directly connected with the computer USB port, the real USB download device, therough which to connect the target board the microcontroller can be downloaded programming easy to use, especially for notebook computers, desktop computer, through the USB port programming download debugging.Feature:-Supprot AT89S51/52 single-chip-Support AVR all ASP chips-The output port is ATMEL standard port-With USB power and target board support target voltage 5V, can be selected through the jumper cap connection. -AUTOSPEED automatic speed control firmware, the downloader will automatically track the chip to be programmed frequency, automatically change the speed to achieve automatic speed control.-Reserved MOSI, MISO, RET, SCK, VCC, GND. 6PIN interface, user-freindly connection to the target board.-Set PROGRAMMING programming interface, the user can upgarde the downloader firmware.Support chip listing :51 series:AT89S51 AT89S52 AT89S53 AT89S8252