= Funcube Dongle Pro=

=== Major components ===
The FCDP hardware seems to be using the following components: * Microchip PIC24FJ32GB002 * 16-bit low power microcontroller with Full-Speed USB, 32 KB Flash memory, 8 KB RAM, and advanced peripherals, 28-pin package * homepage: http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=en536120 * datasheet: http://ww1.microchip.com/downloads/en/DeviceDoc/39940d.pdf * TI TLV320AIC3104 Low-Power Stereo CODEC with 6 Inputs, 6 Outputs, HP Amp and Enhanced Digital Effects * homepage: http://focus.ti.com/docs/prod/folders/print/tlv320aic3104.html * datasheet: http://focus.ti.com/general/docs/lit/getliterature.tsp?genericPartNumber=tlv320aic3104&fileType=pdf * Elonics E4000 Zero-IF Low Power CMOS Multiband Tuner (64 to 1700 MHz) * homepage: http://www.elonics.com/products/rf_tuners.do?id=1 * product brief: http://www.elonics.com/assets/PB_E4000_10_2009.pdf

=== Architecture ===
The hardware architecture therefore is quite simple:

The PIC24F implements the USB protocol/interfaces for HID (tuning) and audio towards the PC. It also drives the TI codec and the Elonics silicon tuner via an I2C interface.

Analog RF data enters the Elonics silicon tuner, where it undergoes zero-if down-conversion to complex I/Q baseband, which enters the TI audio codec where it is digitized using left/right channels for i/q. The resulting digital audio stream is passed to the PIC24F, which forwards it via USB to the host PC.