#avr Logs

Apr 06 2020

04:38 AM Angs: I have a design that uses Attiny10. It's problematic that it operates at 3.3V but needs 5V for programming. Does anyone know if I can substitute it with another MCU that I wouldn't need to change the program or min. effort to modify it, and the MCU can be programmed by 3.3V?
06:55 AM Fuchikoma: Angs: I'm guessing you have other 3.3v devices that might not tolerate 5v?
06:58 AM Angs: Fuchikoma, yes true, I could add zener etc. but it would be easier to replace with a MCU that can support 3.3V programming
06:59 AM Fuchikoma: If you can find one
06:59 AM Fuchikoma: Lemme check something
06:59 AM Angs: I am not familiar with AVR products. Do all similar Attiny4 MCU need 5V programming?
07:00 AM Fuchikoma: That's what I was checking, and the answer is "No"
07:01 AM Fuchikoma: Annoyingly there's several different programming schemes with incompatable requirements
07:02 AM Fuchikoma: The ATtinyx14 series, which I'm familiar with, are considerably larger than the tiny10 but use UPDI which will operate at 3.3v
07:04 AM Angs: I can check the products with pin voltage etc. requirements. In terms of the software porting. Do you think it is a straight forward process to use a code for attiny 4 to attiny XX?
07:05 AM Fuchikoma: It should be fairly painless I think
07:05 AM Angs: ok, thank you
07:05 AM Fuchikoma: Both 8bit AVR cores
07:05 AM Fuchikoma: Possibly some fuckery with how periphrials are configured
07:07 AM Fuchikoma: (It wold seriously be easier to hack a diode in there though, tbh. You're modifyign the board layour either way)
07:08 AM Angs: ok, thanks
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