I am onto a project where a need more memory. I saw the 23LC1024 chips are very popular with the Arduino DUE.

A very helpful person told me he did some timing tests on the 23LC1024 and a page read/write of 32 bytes costs about 100 μs.

I am interested in real time audio manipulation application (using the Arduino Due's ADCs and DACs).

This time of 100μs per 32 bytes seems a lot for the application, though i am not sure.

Are there benchmarking tests of the Arduino DUE for the time it takes to read/write to its memory, so i can compare with this chip and decide what to do?

  • You really don't want to use an external SPI memory for that. Switch instead to either a processor with more on-chip RAM (maybe another SAM series part, or maybe the top end Teensy), or even more appropriately for such a task, switch to an SoC which uses a variety of external parallel DRAM and likely has on-chip caches to further speed access to it. These don't necessarily cost any more today, though they do add some system complexity. Jul 12 '17 at 20:37
  • Personally I use the PIC32MZ with an external I2S DAC or CODEC chip. 200MHz 512kB RAM, 2MB flash... And programmable in the Arduino IDE...
    – Majenko
    Jul 12 '17 at 23:17
  • Besides, using DMA to read from the ADC and write to the DAC leaves plenty of CPU time for shuffling memory around between internal and external RAM blocks.
    – Majenko
    Jul 12 '17 at 23:19
  • I didn't know this chip was programmable from the arduino IDE! Does it follows the same code structure (setup, loop)? Also the chip is available in bulk form. I would have to build a circuit and solder components to program it right? Any references on the circuit? Jul 13 '17 at 10:09
  • Also, could you please mention the I2C DAC chip you were using? Jul 13 '17 at 14:24

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