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4
votes
1answer
217 views

Microcontroler with external bus

I am looking for some microcontroler with external bus for program memory, and witch is supported by GCC. I read this Atmel ATSam3U datasheet (I have no experience with this familly, yet) and there ...
4
votes
2answers
601 views

What Are Lock Bits?

What are lock bits in microcontrollers used for? Are they something specific to AVRs, or used more of a general concept in microcontrollers?
5
votes
1answer
1k views

ATTiny2313 ISR stack usage

I'm using an ATTiny2313 to act as a serial concentrator. It only has 128bytes of RAM. I think I'm running out of RAM during the ISR. My question is how much RAM (stack) does an ISR use to save the ...