A system is disclosed for interfacing a wireless communication device
baseband module and a radio frequency integrated circuit. The system
accepts a control signal from the baseband module. The control signal
from the baseband module is generally at a first baseband voltage. The
first baseband voltage is generally the baseband operating voltage level.
The system distributes the control signal, via data latches, to a
plurality of local level shifters. The plurality of local level shifters
are associated with components of the radio frequency integrated circuit.
The local level shifters convert the control signal to a shifted control
signal at a second voltage level. The second voltage level is generally
the component operating voltage. The shifted control signal may be
maintained at the component while the radio frequency integrated circuit
is intermittently shutdown. The system eliminates the need to reprogram
radio frequency integrated circuit components after the shutdown period.