3. Bus Slave
An ASB bus slave responds to transfers initiated by bus masters within the system. The slave uses a DSEL select signal from the decoder to determine when it should respond to a bus transfer. All other signals required for the transfer, such as the address and control information, will be generated by the bus master. The decoder greatly simplifies the slave interface and removes the need for the slave to understand the different types of transfer.
4. Transfer response
A slave must provide a transfer response in the LOW phase of BCLK when DSEL is asserted. Using the BWAIT, BERROR and BLAST signals one of the following responses must be generated.