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Hi, I find a problem when I wanted to run a ATMEGA32 with VCC supply of 3.3V, everything is okay except USART. I see that if supply voltage is 5V then USART works well. With the same ttl/rs232 module and supply voltage of 3.3V USART works fine with STM32 MCU. I used internal 8 Mhz clock both for AVR and ARM. what is the suggestion to overcome the problem in AVR?
That means it could do absolutely anything at all - without any apparent rhyme, reason, consistency or repeatability.
Anything at all??? Looks like you're in the realms of fantasy again.
Even though I've had a large electrolytic capacitor fly past my ear when connected the wrong way round (actually, more than once), it's highly unlikely that an RS232 chip is going to spontaneously morph into an irresistible virgin when driven from too high a voltage.
it's highly unlikely that an RS232 chip is going to spontaneously morph into an irresistible virgin when driven from too high a voltage. first we are discussing running from too low a voltage. Second with too high a voltage the result is more likely a brick than a 'virgin'
en.wikipedia.org/.../Hyperbole
Hyperbole:
So when a paid code reviewer says that your code is a pile of cow excrement, they probably mean to say that they noticed a typo in a comment.
"So when a paid code reviewer says that your code is a pile of cow excrement, they probably mean to say that they noticed a typo in a comment."
No, I'd say Hyperbole is how that code reviewer described their skills before getting the job. Since it would be way better if the code reviewer managed a constructive report about what was found wrong and things to consider to improve the code.
Seems reasonable. Also highly likely if that code reviewer calls himself a consultant ;)