AMD-761 Datasheet, PDF (19/264 Pages) Advanced Micro Devices – AMD-761-TM System Controller Software/BIOS Design Guide

24081D—February 2002
Preliminary Information
AMD-761™ System Controller Software/BIOS Design Guide
Table 1. AMD-761™ System Controller Configuration Register Bits Unknown at RESET# (Continued)
Register Name
Offset
DDR MAB/MAA Pad Configuration
Dev 0:F1:0x98
Bit Name
PSlewMAB
NSlewMAB
PDrvMAB
NDrvMAB
PSlewMAA
NSlewMAA
PDrvMAA
NDrvMAA
Bit(s)
[29:27]
[26:24]
[19:18]
[17:16]
[13:11]
[10:8]
[3:2]
[1:0]
Refer to Section 7 on page 211 for suggested values for these
configuration registers.
1.1.4
Programming Reserved Bits
The AMD-761 system controller has many bits that are
specified as reserved and which may be used in future silicon
revisions. BIOS must always write a 0 to these bits and not
depend on the value read back.
1.1.5
Power Management Considerations
There are several requirements for BIOS initialization of the
AMD-761 system controller’s configuration register when
supporting power management. Refer to Section 4 on page 185
for further details of these requirements.
For any system enabling the S3 state, a number of core logic
PCI configuration registers and processor MSRs must be saved
or restored prior to suspending or restoring S3. Also, certain
hidden bits must be unmasked. These requirements apply to all
platforms regardless of segment and whether or not AMD
PowerNow!™ is used.
Chapter 1
Overview
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