1. Introduction
6
SPI-8150-LVA, SPI-8151-LVA
1.5 Power Management Features
Overview
y SMRAM space remapping to A0000h (128KB)
y Optional Extended SMRAM space above 256MB, additional 512KB, 1MB
TSEG from Top of Memory, cacheable
y Stop Clock Grant and Halt special cycle translation from the host to the hub
interface
y ACPI Compliant power management
y APIC Buffer Management
y SMI, SCI, and SERR error indication
Specifications Supported
y APM rev. 1.2
y ACPI Rev. 1.0
y PCI Power Management, Rev. 1.0
y PC 99 System Design Guide, Rev. 1.0
1.6 Power Requirements
Your system requires a clean, steady power source for reliable performance of the high
frequency CPU on the SPI-8150/1-LLVA Industrial CPU card, the quality of the power
supply is even more important. For the best performance make sure your power supply
provides a range of 4.75 volts minimum to 5.25 volts maximum DC power source
.
y Rise time for power supply: 2 ms to 20 ms
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