4.3. Decoder

The system decoder is used to decode the address bus and generate select lines to each of the system bus slaves, indicating that a read or write access to that slave is required. Figure 4.12 shows the decoder module interface block diagram.

Figure 4.12. Decoder module interface diagram

This module only contains a combinatorial decode of the system address bus, using the Remap input to control the selection of the internal and external memory.

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