II.  AMBA ASB
The ASB is a high-performance pipelined bus, which supports multiple bus masters.  The basic flow of the bus operation is: 
1. The arbiter determines which master is granted access to the bus.
2. When granted, a master initiates transfers on the bus.
3. The decoder uses the high order address lines to select a bus slave.
4. The slave provides a transfer response back to the bus master and data is  transferred between the master and slave[21] .