Circuit for and method of configuring and partially reconfiguring function blocks of an integrated circuit device

A circuit for configuring function blocks of an integrated circuit device is described. The circuit comprises a processing system; a peripheral interface bus coupled to the processing system; and a function block coupled to the peripheral interface bus, the function block having programming registers and a function block core; wherein the programming registers store data determining a functionality of the function block core and comprise programming control registers enabling a configuration of the function block core using the data. A method of configuring function blocks of an integrated circuit device is also described.