A Global System for Mobile (GSM) cellular system transceiver with time division duplexed operations for receiving a data signal, monitoring received signal strength and transmitting a data signal during a single time frame. Multiple data registers are used to store the phase lock loop (PLL) frequency control data, e.g., during the last time slot (slot 7) of the prior time frame (or elsewhere in the prior time frame where time permits). Also during slot 7 of the prior time frame, the PLL is programmed using the first data set for the data reception operation to be performed during one or more of the initial time slots (e.g., time slots 0-3) of the present time frame. During the next time slot (e.g., slot 4), the PLL is programmed using the second data set for the signal strength monitoring operation to be performed during that same time slot. During the next time slot (e.g., slot 5), the PLL is programmed using the third data set for the data transmission operation to be performed beginning in that same time slot. By prestoring all three PLL frequency control data sets, such data sets are immediately available when later programming the PLL, thereby reducing the PLL setup time needed prior to each use. Consequently, an integer PLL can be used instead of a fractional PLL while still achieving a sufficiently fast combined setup and lock time, thereby minimizing integrated circuit area and power requirements.