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2. System Reference
SPI-8451-LLVA, SPI-8452-LLVA, SPI-8451-LVA
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Power Requirements
Your system requires a clean, steady power source for reliable performance of the high frequency CPU on
the product, the quality of the power supply is even more important.
Power Consumption
For typical configurations, the CPU board is designed to operate with at least a 250W power supply. A
higher-wattage power supply should be used for heavily-loaded configurations. The power supply must
meet the following requirements:
- Rise time for power supply: 2 ms - 20 ms
- Minimum delay for reset to Power Good: 100ms
- Minimum Power down warning: 1 ms
The following table lists the power supply’s tolerances for DC voltages:
Table 2.3. DC voltage tolerance
DC Voltage Acceptable Tolerance
+ 5V +5%
+ 5VSB (Stand by) +5%
+ 12V +5%