AMBA 2 Specification
The AMBA 2 specification defines a set of two interface protocols that, between them, cover the on-chip data traffic requirements from data intensive processing components requiring high data throughput and low bandwidth communication requiring low gate count and power. The AMBA 3 specification replaces AMBA 2 and should be used for new designs. Existing AMBA 2 peripherals can be used in an AMBA 3 based system. The interfaces are: AMBA 2 AHB Interface The AMBA 2 AHB interface specification enables highly efficient interconnect between masters in a single frequency system. This interface includes all of the capabilities of the AMBA 3 AHB interface but also enables the use of arbitration between masters in the construction AMBA 3 APB Interface The AMBA 3 APB interface specification supports the low bandwidth transactions necessary to access configuration registers in peripherals and data traffic through low bandwidth peripherals. The highly compact and low power interface isolates this data traffic from the high performance AMBA 2 AHB interconnect. Back to Top | 
