Abstract: A communications apparatus is provided. A first wireless communications module provides a first wireless communications service and communicates with a first communications device in compliance with a first protocol. A second wireless communications module provides a second wireless communications service and communicates with a second communications device in compliance with a second protocol. A clock source is shared by the first and the second communications modules and provides a reference clock to the first and the second communications modules. The first wireless communications module detects a request from the second wireless communications module for activating the clock source, determines whether the reference clock has been stably generated by the clock source, and adjusts an electrical characteristic of the clock source to facilitate the reference clock output from the clock source to achieve a target frequency when the reference clock has not been stably generated.

Abstract: A wireless communications module coexisting with a wireless telephony communications module includes a radio frequency (RF) module, a MODEM, a clock generator and distributor and a system control logic. The system control logic issues an external interrupt (EINT) signal to the wireless telephony communications module for activating a clock source via the wireless telephony communications module. When the clock source is activated, the clock generator and distributor receives a reference clock from the activated clock source, converts the reference clock into one or more internal clocks and drives the internal clock or clocks to the RF module and the MODEM for synchronization therebetween.

Abstract: A communications apparatus is provided. A first wireless communications module provides a first wireless communications service and communicates with a first communications device in compliance with a first protocol. A second wireless communications module provides a second wireless communications service and communicates with a second communications device in compliance with a second protocol. A clock source is shared by the first and the second communications modules and provides a reference clock to the first and the second communications modules. The first wireless communications module detects a request from the second wireless communications module for activating the clock source, determines whether the reference clock has been stably generated by the clock source, and adjusts an electrical characteristic of the clock source to facilitate the reference clock output from the clock source to achieve a target frequency when the reference clock has not been stably generated.