Patent ID: 7212786

Claim:
A wireless communication device applicable to a wireless communication network, comprising: an RF part for performing wireless communications; and a baseband part interfaced to the RF part and performing data processing, wherein the RF part generates a first clock signal, wherein the baseband part generates a second clock signal, controls start and stop of generation of the first clock signal, uses the first clock signal to perform data processing and a clocking operation, uses the second clock signal to perform a timer operation and a clocking operation in a low power consumption state in which the first clock signal is stopped, and generates a generation timing of the first clock signal by the timer operation, wherein the baseband part has a central processing unit for performing the data processing, and the central processing unit operates in synchronization with an operation clock signal which is formed based on the first clock signal, wherein when a control signal for stopping the first clock signal of the RF part is issued from the baseband part, even if supply of the first clock signal from the RF part to the baseband part is stopped, the baseband part generates a generation timing of the first clock signal by a timer operation using the second clock signal, and wherein since the timer operation performed by the baseband part uses the second clock signal with which the clocking operation is performed, clock reactivation of the first clock signal can be timed to other operations based on a shared clock signal.