A1.4 Interfaces

ETM-M33 has the following main interfaces:

Processor interface
This block connects to the ETM-M33 interface. It tracks the execution information from the processor, decodes the control signals, and passes on the information to the internal interfaces.
ATB
There is one ATB interface which is the instruction ATB interface. This reads single bytes of packet information from the instruction FIFO and sends them over the instruction ATB interface.
APB interface
This block implements the interface to the APB that provides access to the programmable registers.
Production test
This interface contains the scan enable signal used in production testing of ETM-M33.

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