Abstract: An integrated circuit includes a frequency prescaler for producing an infrared transmission carrier; a duty-cycle selector for adjustably setting the carrier's duty cycles; as well as a pulse generator and hardware modulator to generate a signal of desired waveform for infrared transmission. The integrated circuit also includes a multiplexer for receiving the signal of desired waveform from the hardware modulator and a data output signal in producing a selected output signal responsive to a control signal. The integrated circuit further includes an output buffer coupled to the multiplexer for transferring data to an output terminal.

Abstract: An analog to digital conversion device integrated in a microcontroller that is accomplished on a single chip, the device comprising: an adjustable gain amplifier, used to obtain a corresponding analog voltage signal V1—V2 after corresponding an input analog voltage V1 to a reference voltage V2, and based on a corresponding relationship of a gain function A, performing an amplification operation to a corresponding analog voltage signal, and further outputting an amplified analog voltage signal A(V1−V2); and a n-bit analog to digital converter, having a reference voltage Vr, electrically coupling to an output of the adjustable gain amplifier, used to convert the amplified analog voltage signal into a digital voltage signal, and outputting the digital voltage signal, wherein the gain function of the adjustable gain amplifier can be provided to the microcontroller to perform an adjustment according to the reference voltage Vr and a relationship of a peak value of the input corresponding analog voltage

Abstract: The present invention is related to an improved architecture of an integrated circuit with remote transmission function. For no additional carrier circuit is needed, for example in a preferred embodiment, an infrared signal is served as the medium for remote transmission to connect with other interfaces, so as for integration design of the infrared transmission arrangement and the integrated circuit, thereby saving elements in hardware design and the time and costs for design, and improving the working efficiency. Furthermore, a multiplexer receives a select control signal to control the output type, so as for the pin of the integrated circuit for remote transmission applicable for general input/output port in other situations in addition to the infrared transmission.

Abstract: An analog to digital conversion device integrated in a microcontroller that is accomplished on a single chip, the device comprising: an adjustable gain amplifier, used to obtain a corresponding analog voltage signal V1−V2 after corresponding an input analog voltage V1 to a reference voltage V2, and based on a corresponding relationship of a gain function A, performing an amplification operation to a corresponding analog voltage signal, and further outputting an amplified analog voltage signal A(V1−V2); and a n-bit analog to digital converter, having a reference voltage Vr, electrically coupling to an output of the adjustable gain amplifier, used to convert the amplified analog voltage signal into a digital voltage signal, and outputting the digital voltage signal, wherein the gain function of the adjustable gain amplifier can be provided to the microcontroller to perform an adjustment according to the reference voltage Vr and a relationship of a peak value of the input corresponding analog voltage