DM32 Prototype Unboxing and Introduction (HP 32Sii upgrade)

[Sylvain Cote]

(09-29-2022 04:33 PM)Eric Rechlin Wrote:  To be fair, he said it only had 768 KB of RAM, not 1.5 MB, and I believe he also said 512 KB of that was used by the OS (DMCP), leaving 256 KB for the 32SII application. Just running the calculator application may take a good deal of that 256 KB (I honestly have no idea though). Maybe a little could be spared, but there's not as much memory as you think.

Remember that in the MCU world, code are run directly from MCU internal NOR Flash and MCU internal SRAM is only used for data.

Memories (from: STM32U575RI home page)

• 2-Mbyte Flash memory with ECC, 2 banks read-while-write, including 512 Kbytes with 100 kcycles
• 786-Kbyte SRAM with ECC OFF or 722-Kbyte SRAM including up to 322-Kbyte SRAM with ECC ON
• External memory interface supporting SRAM, PSRAM, NOR, NAND and FRAM memories
• 2 Octo-SPI memory interfaces