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Multiple function integrated circuit

  • US 20060075166A1
  • Filed: 12/05/2005
  • Published: 04/06/2006
  • Est. Priority Date: 10/25/2002
  • Status: Abandoned Application
First Claim
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1. An integrated circuit for an MP3 player comprises:

  • a universal serial bus (USB) interface operable to receive or transmit data with a host device when the MP3 player is operably coupled to the host device via the USB interface;

    a bus operably coupled to the USB interface;

    a digital signal processor (DSP) operably coupled to the bus, wherein the DSP places the MP3 device in a first functional mode when the USB interface is operably coupled to the host device and places the MP3 device in a second functional mode when the USB interface is not operably coupled to the host device;

    external memory interface operably coupled to the bus and memory, wherein, when the MP3 device is in the first functional mode, the external memory interface provides received data of the data received from the host device to the memory for storage and provides transmitting data of the data transmitted to the host device from the memory to the USB interface via the bus;

    an analog to digital converter (ADC) for converting an analog input signal into a digital input data that is placed on the bus;

    a digital to analog converter (DAC) for converting output data into analog audio outputs signals;

    clock generator operably coupled to produce a clock signal for at least one of the DSP, the ADC, the USB interface, and the DAC; and

    DC to DC converter operably coupled to provide at least a first supply voltage to at least one of the host interface, the processing module, the memory interface, and the multimedia module.

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