A method to burn the M8 chip using only the parallel port (printer interface) on the computer without any external components!! You only need to connect 4 data wires and 1 ground wire, a total of 5 wires, without any resistors and capacitors. The premise is that your computer must have a parallel port (printer interface). Here I will describe the connection between the parallel port and M8 in two ways, using instructions and pictures. First connect pins 12 and 2 of the 25 pins of the parallel port. Pin 25 is ground, connected to pin 8 or pin 22 of M8. If you download it online, you can connect to any ground point on the PCB. Pin 10 is MISO, connected to pin 18 of M8 (most of the GandF designs are also in the interface of the three-wire button) Pin 9 is RES, connected to pin 1 of M8 Pin 7 is MOSI, connected to pin 17 of M8 (most of the GandF designs are also in the interface of the three-wire button) Pin 6 is SCK, connected to pin 19 of M8 (most of the GandF designs are also in the interface of the three-wire button)
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