STn8815

Low power consumption

5/8

Low power consumption

The new multimedia functionality of mobile products brings with it an increase in power

consumption that is outpacing advances in battery technology. The STn8815 chip saves on

power by avoiding the need for high clock speeds wherever possible, but its extremely low

power consumption results from a systematic effort at all design levels to reduce power

requirements. These include:

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The use of smart accelerators and distributed processing to off load from the CPU,

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Efficient code execution by means of innovative algorithms, energy-efficient instruction

set architectures and Java acceleration,

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The efficient use of bandwidth for on-chip data transport, achieved by data

compression, buffering and image scaling,

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Aggressive power management which includes turning off inactive parts of the chip and

keeping the CPU in power-saving modes as much as possible.

Open platform strategy

STMicroelectronics is a founding member of the MIPI™ Alliance working towards mobile

software and hardware interface standards.

Our open platform strategy provides manufacturers with roadmap flexibility, allowing them to

avoid becoming locked into a proprietary CPU architecture or vendor technology. This

approach is facilitated by the following design points.

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The STn8815 employs the third-party ARM® processor which is the standard CPU for

mobile devices, with industry-wide application support.

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Open, standard APIs are provided for the development of application code on a level

which is abstracted from the physical hardware. This allows the development of

multimedia plug-ins that are portable between products and which can be reused on

future products without modification.

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The STn8815 facilitates best-in-class algorithm development on its smart accelerators.

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The STn8815 is provided with development kits and tools that speed-up the integration

of new operating systems, middleware, and signal processing algorithms.