An active stylus, comprising: an electrode tip; and receive circuitry coupled to the electrode tip, the receive circuitry being configured to: receive a capacitive signal from a touch sensor through the electrode tip; characterized in that the receive circuitry is further configured to: determine which of two or more different drive signals produced by respective regions of the touch sensor most strongly influenced the capacitive signal, each region being driven with a respective drive signal and each drive signal being associated with a different operating mode; configure the active stylus and the touch sensor to operate in the operating mode associated with the determined drive signal; identify the region that produced the determined drive signal as corresponding to a location of the active stylus relative to the touch sensor; and receive a capacitive signal most strongly influenced by a sensing drive signal produced by the region, and to identify a current time slot in a touch frame at which the touch sensor is operating based on the sensing drive signal, wherein the operating mode including transmitting from the electrode tip to the touch sensor while the region that produced the determined drive signal is multiplexed to receive circuitry of the touch sensor, and disabling such transmission from the electrode tip to the touch sensor while one or more other regions of the touch sensor are multiplexed to the receive circuitry. an electrode tip; and receive circuitry coupled to the electrode tip, the receive circuitry being configured to: receive a capacitive signal from a touch sensor through the electrode tip; characterized in that the receive circuitry is further configured to: determine which of two or more different drive signals produced by respective regions of the touch sensor most strongly influenced the capacitive signal, each region being driven with a respective drive signal and each drive signal being associated with a different operating mode; configure the active stylus and the touch sensor to operate in the operating mode associated with the determined drive signal; identify the region that produced the determined drive signal as corresponding to a location of the active stylus relative to the touch sensor; and receive a capacitive signal most strongly influenced by a sensing drive signal produced by the region, and to identify a current time slot in a touch frame at which the touch sensor is operating based on the sensing drive signal, wherein the operating mode including transmitting from the electrode tip to the touch sensor while the region that produced the determined drive signal is multiplexed to receive circuitry of the touch sensor, and disabling such transmission from the electrode tip to the touch sensor while one or more other regions of the touch sensor are multiplexed to the receive circuitry. receive a capacitive signal from a touch sensor through the electrode tip; characterized in that the receive circuitry is further configured to: determine which of two or more different drive signals produced by respective regions of the touch sensor most strongly influenced the capacitive signal, each region being driven with a respective drive signal and each drive signal being associated with a different operating mode; configure the active stylus and the touch sensor to operate in the operating mode associated with the determined drive signal; identify the region that produced the determined drive signal as corresponding to a location of the active stylus relative to the touch sensor; and receive a capacitive signal most strongly influenced by a sensing drive signal produced by the region, and to identify a current time slot in a touch frame at which the touch sensor is operating based on the sensing drive signal, wherein the operating mode including transmitting from the electrode tip to the touch sensor while the region that produced the determined drive signal is multiplexed to receive circuitry of the touch sensor, and disabling such transmission from the electrode tip to the touch sensor while one or more other regions of the touch sensor are multiplexed to the receive circuitry. determine which of two or more different drive signals produced by respective regions of the touch sensor most strongly influenced the capacitive signal, each region being driven with a respective drive signal and each drive signal being associated with a different operating mode; configure the active stylus and the touch sensor to operate in the operating mode associated with the determined drive signal; identify the region that produced the determined drive signal as corresponding to a location of the active stylus relative to the touch sensor; and receive a capacitive signal most strongly influenced by a sensing drive signal produced by the region, and to identify a current time slot in a touch frame at which the touch sensor is operating based on the sensing drive signal, wherein the operating mode including transmitting from the electrode tip to the touch sensor while the region that produced the determined drive signal is multiplexed to receive circuitry of the touch sensor, and disabling such transmission from the electrode tip to the touch sensor while one or more other regions of the touch sensor are multiplexed to the receive circuitry.