Radio communication semiconductor integrated circuit, data processing semiconductor integrated circuit and portable device

摘要

A portable device having a communication function composed of a plurality of LSIs operated in synchronization with a clock, such as a baseband LSI and a logic LSI such as an application processor, can synchronize the baseband LSI with the logic LSI without lowering the performance of the logic LSI.

In a portable device having a communication function composed of a plurality of LSIs operated in synchronization with different clocks of a baseband LSI performing processing of modulating transmitted data and demodulating received data and an application processor performing processing of compressing transmitted data and decompressing received data, the baseband LSI has a function of detecting a frequency drift of the clock signal based on time information for synchronization included in received data and a terminal or an interface for outputting a signal including its own time information to the outside, the application processor has a terminal or an interface for inputting a signal including time information from the outside, and the signal including time information is fed from the baseband LSI to the application processor.