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The CRC peripheral is used to perform the Cyclic Redundancy Check (CRC) of the block of data that is presented to the peripheral. The peripheral provides a means to periodically verify the integrity of the system memory, the contents of memory-mapped registers (MMRs), or communication message objects.
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It is based on a CRC32 engine that computes the signature of 32-bit data presented to the peripheral.
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The dedicated hardware compares the calculated signature of the operation to a preloaded expected signature and if the two fail to match, the peripheral generates an error.
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CRC engine can either take the data from an MDMA transfer, or from a source MDMA channel, or from the core.
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In addition to the CRC check, the engine can also be used for initializing large memory sections with a constant value or for verifying that sections of memory are equal to a constant value.
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It supports 32 bit programmable CRC polynomial with bit reverse option.
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Also supports bit/byte/word mirroring options.
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Auto clear and preset of the result is also supported.
