Abstract: A radiotelephone module (100) is detachably connected with another substrate (300) or structure within, for example, a handheld radiotelephone device (1100). The radiotelephone module includes radio frequency transceiver circuitry (104) and power management circuitry (108) mounted on the substrate that is coupled to a physical connection interface such as a connector (106). The power management circuitry (108) is operative to receive battery charging feedback signals (312) from off substrate battery power regulator circuitry (302), such as battery charging regulators that are located on the other substrate (300), and provide battery charging control signals (314) via the connector (106) to the off substrate battery power regulator circuitry (302). The radiotelephone module (100) may be small and detachably plugged into differing handheld radiotelephone devices that may be of differing form factors to allow a modular subassembly to be used among differing wireless radiotelephone handheld devices.

Abstract: A keypad and method for detecting the selection of one of a plurality of key inputs associated with a single key is provided. The keypad includes one or more keys having a primary input selection and three or more secondary input selections. Each secondary input selection has a corresponding switch, where if only one of the switches is engaged when the key is actuated, the corresponding secondary input selection is indicated. If any combination of a plurality of switches are engaged, when the key is actuated, the primary input selection is indicated.