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ZEUS Technical Manual Detailed hardware description
© 2007 Eurotech Ltd Issue D 21
The design supports 520MHz, 416MHz and 312MHz speed variants of the PXA270
processor. The standard variant of the ZEUS board is fitted with the 520MHz version of
PXA270. The maximum speed available for extended temperature versions of the
ZEUS is 416MHz.
A 13MHz external crystal is used to run the PXA270 processor. All other clocks are
generated internally in the processor.
The PXA270 processor family provides multimedia performance, low power
capabilities and rich peripheral integration. Designed for wireless clients, it incorporates
the latest Intel advances in mobile technology over its predecessor, the PXA255
processor. The PXA270 processor features scalability by operating from 104MHz up to
520MHz, providing enough performance for the most demanding control and
monitoring applications.
PXA270 is the first Intel Personal Internet Client Architecture (PCA) processor to
include Intel Wireless MMX technology, enabling high performance, low power
multimedia acceleration with a general-purpose instruction set. Intel Quick Capture
technology provides a flexible and powerful camera interface for capturing digital
images and video. Power consumption is also a critical component. Wireless Intel
SpeedStep technology provides the new capabilities in low power operation.
The processor requires a number of power supply rails. All voltage levels are
generated on-board from either the DC/DC PSU or from the single +5V power input.
The ZEUS uses a specialized Power Management IC to support Intel SpeedStep
technology.
The PXA270 processor is a low power device and does not require a heat sink for
operating temperatures up to 85°C (185°F).