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CLA Shared Message RAMs There are two small memory blocks for data sharing and communication between the CLA and the main CPU. The message RAMs are always mapped to both CPU and CLA memory spaces and are protected by the code security module. The message RAMs allow data accesses only; no program fetches can be performed. – CLA to CPU Message RAM The CLA can use this block to pass data to the main CPU. This block is both readable and writable by the CLA. This block is also readable by the main CPU but writes by the main CPU are ignored. – CPU to CLA Message RAM The main CPU can use this block to pass data and messages to the CLA. This message RAM is both readable and writable by the main CPU. The CLA can perform reads but writes by the CLA are ignored.
