AMD-751 Datasheet, PDF (8/14 Pages) Advanced Micro Devices – AMD-751-TM System Controller Revision Guide

Preliminary Information
AMD-751™ System Controller Revision Guide
22564B-1—February 2000
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Incomplete AMD Athlon System Bus Disconnect Causes AMD-751 To
Hang
Products Affected. C3, C5
Description. An incomplete AMD Athlon™ system bus disconnect sequence (from the AMD Athlon
processor) can hang the AMD-751 system controller. The AMD Athlon may not complete a disconnect
sequence when using STPCLK-throttling power management.
Potential Effect on System. This problem can occur with ACPI thermal zone support (thermal-throttling
power management) or processor C2/C3 support enabled.
Suggested Workaround. STPCLK throttling (thermal zone) and processor C2/C3 are not supported at this
time. STPCLK throttling is not required for support of the ACPI S1 state.
Resolution Status. Fixed in C3.
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