The subsystem peripherals are an important set of functional blocks used with a microprocessor. These peripherals include all of the low level functionality that must be implemented around the processor so it can be used in an application. To make designing with processors easier, Actel supplies a full range of subsystem peripherals, including an AHB bus interface, APB bus interface, AHB to APB bridge, memory controller, interrupt controller, timers, serial interface, buffered I/O interface, and many other functions. All of these subsystem peripherals connect to the processor with the AMBA bus and are delivered for free as part of the Libero IDE Catalog or the CoreConsole IP Deployment Platform (IDP).

For more information on the AMBA bus, visit ARM's website.