Intel PXA270, Optimization Manual

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A-2 Intel® PXA27x Processor Family Optimization Guide
Performance Checklist
A.2 Power Optimization Guidelines
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Use 1.8 V SDRAM, if possible
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Implement multiple power modes so that the system can switch to the lowest possible power
mode required to meet the processing requirements at that time
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Switch to run mode instead of turbo mode during times when less processing power is needed
at the lowest possible run and turbo mode frequencies
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Higher run and turbo mode frequencies consume more power. Optimize system for desired
power and performance
•
Consider performing a frequency change sequence to a lower run frequency if the 500-µS
delay is acceptable for your application
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Use the SDRAM APD bit
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Use half-turbo mode to reduce the core clock frequency without impacting bus operations
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Use minimum Memory Buffer register strength settings possible
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Use minimum LCD Buffer Strength register settings possible
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Use Intel® Quick Capture Interface to bring image data in YCbCr mode, when possible