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MSP430FR2033: Read spead

Shuhei Goto
Intellectual 2450 points
Part Number: MSP430FR2033

Hi team,

How long does it take to read 96 bytes of data from FRAM to RAM?
The core frequency is 1 MHz.
The program is on FRAM.
96cycle?

Best regards,
Goto

  • 0
    Guru 34373 points

    If you want to copy data from FRAM to RAM, it will take more than one cycle per byte.

    For example, reading with mov.w @R13+, R15 will take 2 cycles, and store mov.w R15, 0(R14) will take 3 cycles, and one cycle for R14 increment, total 6 cycles per word.

    This is without loop test for R13 (or R14) border for each iteration.

  • 0 in reply to zrno soli
    TI__Mastermind 28445 points

    Hey Goto,

    Zrno has a very detailed answer.  If you write the code in code composer, you can also look at the disassembly to see the assembly instructions the c-compiler used and try and count the cycles like Zrno did from there.  

    Thanks,

    JD

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