Other Interfaces - 1.1 English

Advanced Encryption Standard (AES) Engine LogiCORE IP Product Guide (PG383)

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1.1 English

The following is a scenario that you might come across on the metadata (key/IV) handshake interface during simulation of the core:

key_fetch not asserting
In case of high-throughput mode of operation, if you see key_fetch not asserting after awhile, it might be due to more than one packet inside the pipeline. Ensure that m_axis_tready is asserted to flush out one or more packets from the pipeline after which key_fetch would be asserted again. This is done to ensure that the core does not accept extra keys and overwrite the existing ones.