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0

I think there is an error concerning the information about supply voltages. At least it's not consistent: microchip has separate websites for ATmega328 and ATmega328p. On the site for the ATmega328p it says: "The device operates between 1.8-5.5 volts". But the datasheet they link on the exact same site says: "Operating voltage: 2.7V to 5.5V for ...


3

You have ATmega328P-AU. Classic Uno with DIP socket has ATmega328P-PU. Arduino Uno SMD has Atmega328P-MU. The automotive versions ATmega328P-15AZ and ATmega328P-15MZ have separate datasheet starting in Revision History with Creation of the automotive version starting from industrial version based on the ATmega48P/88P/168P/328P datasheet 8025F-AVR-08/08....


1

The answer i've accepted is the proper answer for the problem i asked. However replacing the C runtime requires to attach and maintain a lot of crt.S files oiginally related to the GCC. To avoid this i "slept several times over this prolem" and came out another solution. After compiling the host application that have to redirect the interrupt calls (script ...


1

1KB is 1024 bytes, not 1000 bytes. Therefore 32kb = 32768 bytes. 32768-512=32256, which is exactly the value used for upload.maximum_size for the 328p. 4kb=4096 bytes. 32768-4096=28672 which is the value for the 32u4.


1

I'd also suggest looking into different microprocessors. The Teensy models often have an SD card socket, and the Teensy 4 (especially if they release one with a built-in SD socket) is extremely fast and capable (600MHZ, dual instructions/cycle). That would be far better suited than an Arduino, though you'll still have RAM limits. (Nowhere near 200 megs, but ...


6

There are SRAM ICs / boards, however, don't expect 100 MB, more like 1 MB (with the pin numbers and connectivity / protocols that an Arduino offers). With Flash you can get much further, but it can only be written a number of times; not sure if that suits your requirements. Beyond that, I'm afraid the real problem is in the processing speed. Mixing 100 ...


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