Patent ID: 6925558

Claim:
An apparatus, comprising: a first register to store default configuration data; a second register coupled to the first register to store active configuration data; an input circuit coupled to the second register to receive input data different than the default configuration data to be programmed into the second register; control logic coupled to the first register, the second register, and the input circuit to load the second register with data selected from either the default configuration data from the first register or input data from the input circuit; and reset logic coupled to the first register and the second register to select between loading the second register with the default configuration data and retaining a previous content of the second resister in the second register, the reset logic including a first reset line to carry a first reset signal to load default data from the first register into the second register, a second reset line coupled to the programmable selection circuit to carry a second reset signal, and a programmable selection circuit to store a selection value to determine if the second reset signal causes the second register to be loaded with the default configuration data from the first register or causes the second resister to retain its data.