Abstract: A user programmable input apparatus with a keyboard comprises several keys with one or more special keys thereof on the keyboard for input operations, a microprocessor to receive inputs from the keys when they are pressed, a nonvolatile memory programmable by operating the keys for users themselves to program or define key definitions or functions for the keyboard or to store data or microinstructions or other programs thereto, and a transmission arrangement connected to the microprocessor to output data to the computer system or other peripheral connected with the input apparatus.

Abstract: A user programmable input apparatus with a keyboard comprises several keys with one or more special keys thereof on the keyboard for input operations, a microprocessor to receive inputs from the keys when they are pressed, a nonvolatile memory programmable by operating the keys for users themselves to program or define key definitions or functions for the keyboard or to store data or microinstructions or other programs thereto, and a transmission arrangement connected to the microprocessor to output data to the computer system or other peripheral connected with the input apparatus.

Abstract: A single crystal oscillator RF transmitter system converts a data to be transmitted into RF packets by a converter under the control of a microprocessor, receives the RF packets and generates an RF signal accordingly to be sent out by a transmitter. The system comprises a local oscillator to generate a first clock in response to an external crystal to provide for the transmitter and connected to a clock switch which divides the frequency of the first clock so as to generate a second clock to the microprocessor and a third clock to the converter. Alternatively, an RC oscillator generates a fourth clock for the clock switch to provide the second and third clocks for the microprocessor and converter, respectively.