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TM4C1294NCPDT: Atomicity in write and read instructions in cortex M4?

APOORV GARG
Intellectual 450 points
Part Number: TM4C1294NCPDT

Hi,

I know this is a arm architecture related question and not for this forum, but still needed help!

IS write to a uint32_t and read from a uint32_t atomic?

Regards,

Apoorv

  • 0
    TI__Guru**** 183476 points
    Hi,

    Reading a 32-bit memory location cannot be interrupt no matter how many wait states the memory access will take whether internal or external memory. Same for a 32-bit write to a memory. However, if you have a 32-bit read followed by a 32-bit write or vice versa then this read-write sequence can be interrupted.