Most tutorials that i found use an atmel programming chip, or solder some wires on the esc, but I cant find the atmel chip and my board doesnt have pins to solder the wires. I found this tutorial that the solder happens on the atmega chip (Reprogramando (Flashing) o ESC - SimonK - YouTube), but it is in spanish. I think base on the schematic for my chip i found (https://raw.githubusercontent.com/NicksonYap/XXD-HW30A-ESC-Schematic/master/images/schematic.png), i have to solder mosi on pin 15, miso on 16, sck on 17, reset on 29 and i dont know about vcc and gnd.
a) Will this work?
b)there are 3 gnd pins and 3 vcc pins which one do i choose?
c) Just to be sure, if the letters on the chip are not reversed or upside down, the chip is on the same orientation as the one in the schematic, right?
Here is a picture of the esc, if it helps IMG_20210902_111125|666x500
edit: i just figured out about vcc and gnd, they are pins 4,6(vcc), 5,21(gnd) [according to the video]