Short summary datasheet for the ATmega128 AVR microcontroller, 235 KB in PDF format. It generally contains the feature overview, 64-pin package pinout, pin descriptions and ordering information, without the register-level chapters. Technicians use it as a quick reference to find power, reset, crystal, ISP and JTAG pins when tracing signals or checking shorts. For fuse settings, programming details and full electrical tables, refer to the complete ATmega128 datasheet before working on the chip.
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