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Inside the Xbox 360 Wireless Racing Wheel
>> From eetindia.co.in:
[QUOTE]
Upon taking apart the many layers of plastic that comprise the steering wheel controller, the main PCB is exposed. There are three large ICs, two with Microsoft markings, and a third, the Atmel AT91SAM7S32. The interesting parts are the Microsoft parts. Obviously Microsoft does not make chips, so whose ICs are they? We asked the good people of Semiconductor Insights to de-encapsulate (or decap) the devices to find out.
Looking first at the shielded wireless device labelled "Microsoft X80199," it is revealed to be a National Semiconductor LMX420CL. Further inspection of the die reveals RF and analogue circuitry, as well as a significant amount of logic. From the FCC filings associated with this device, the 2.4-GHz band is mentioned as the communications frequency, so this device is indeed a Bluetooth transceiver. This device cannot be found on the National Semiconductor Web site, but could be similar to their other LMX labelled Bluetooth offerings.
The second Microsoft die, labelled "X81376," contains another National Semiconductor device, the SC14470C mixed-signal microcontroller. This is one of two microcontrollers on the PCB, combining with the Atmel AT91SAM7 to provide the processing power for the steering wheel.
[/QUOTE]
Full Story: eetindia.co.in
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