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watterott / ATmega328PB-Testing

Atmel/Microchip ATmega328PB support for Arduino IDE
https://learn.watterott.com
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Dead chips #44

Closed LuisCRSousa closed 6 years ago

LuisCRSousa commented 6 years ago

After tried to upload this bootloader to my custom 3.3V and external 8MHz the chip loats connection to the ISP MKII and ICE. I can't get it even to read the fuses using the atmel studio tools

awatterott commented 6 years ago

How do you have programmed the bootloader? If you have used the Arduino IDE, which board have you selected? Please also post a schematic of your custom board.

LuisCRSousa commented 6 years ago

Programmed with Arduino IDE and selected 328pb 3.3V 8Mhz external. Tested with 3 chips, all dead after bootloader. All worked fine before the upload.

awatterott commented 6 years ago

For a crystal oscillator or ceramic resonators you have to select "Crystal Clock". "External Clock" is for an active ext. clock source.