AMD-751 Advanced Micro Devices, AMD-751 Datasheet
AMD-751
Related parts for AMD-751
AMD-751 Summary of contents
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... Preliminary Information AMD-751 System Controller Revision Guide Publication # 22564 Rev: B-1 Issue Date: February 2000 TM ...
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... AMD reserves the right to discontinue or make changes to its products at any time without notice. Trademarks AMD, the AMD logo, and combinations thereof, AMD Athlon, AMD-751, and AMD-756 are trademarks of Ad- vanced Micro Devices, Inc. Other product names used in this publication are for identification purposes only and may be trademarks of their respective companies ...
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... Occasionally AMD identifies deviations from or changes to the specification of the AMD-751 system controller. These changes are documented in the AMD-751 System Controller Revision Guide as errata. Descriptions are written to assist system and software designers in using the AMD-751 and corrections to AMD’s documentation on the AMD-751 system controller are included. This release documents currently characterized product errata ...
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... AMD-751™ System Controller Revision Guide 1 Product Marking Identification 1.1 Production Marking Family/Core AMD-751 Product Revision Table 1. OPN AMD-751AC 492-pin PBGA ATX Note: 2 Preliminary Information AMD-751 TM AMD-751AC B Date Code AMD 1999 c Valid Combinations for Ordering Parts Package Type Operating Voltage 3.135 V–3.6 V Valid combinations are configurations that are or will be supported in volume for this device ...
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... Product Errata This section documents AMD-751 system controller product errata. A unique tracking number for each erratum has been assigned within this document for user convenience in tracking the errata within specific revision levels. Table 2 cross-references the revisions of the processor to each erratum. An “X” ...
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... Arbitration Latency Due to No Bus Preemption Products Affected. C3 Description. The AMD-751 PCI arbiter can impose long latencies on external PCI bus masters when any master that currently owns the bus is attempting long transfers due to not correctly supporting bus preemption. When a PCI master’s bus grant is active and another master requests the bus, the arbiter should immediately deassert the grant to the first master, thus preempting the first master ...
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... Description. If DMA is active when ARB_DIS is set, the system can hang. Potential Effect on System. System hang could occur. Suggested Workaround. Prior to setting ARB_DIS, software suspends all DMA activity. Resolution Status. Fixed in a future revision of the AMD-751 system controller. 8 GART Requestors Do Not Work With TLB Caches Off Products Affected ...
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... 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 ...
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... Description. Voltage on the Vcc (3.3-V supply) pins cannot exceed the voltage on the 5-V reference pin (Ref_5V). Potential Effect on System. The AMD-751 can go into a latch-up state, and permanent damage to the part may result. Suggested Workaround. Specify the system power supply whose outputs ramp up and ramp down, such that the 3.3V outputs never supply voltage higher than the 5-V outputs. For more information, see the AMD Athlon™ ...
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... Description. Running in DOS under Windows, MechWarrior2 creates burst writes to non-existent AGP memory that intentionally cause master abort cycles from the S3 Savage4 graphics card to the system controller. The AMD-751 system controller does not handle master abort cycles in the quantity generated by the S3 Savage4 graphics card. This behavior to the system controller is caused by the software/driver when write combining is enabled and is not considered appropriate nor indicative of any common software technique ...
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... AGP AD_STB[1:0] Strobe Glitch with Nvidia NV10-Based (GeForce) Cards Products Affected. All revisions (C3 and C5) Description. The AMD-751 system controller’s AD_STB[1:0] signals may experience noise due to strong drive strengths. This noise may result in signal glitches, causing incorrect information to be strobed into the AGP adapter. ...
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... Suggested Workarounds. 1. Vendors should use memory DIMMs only from an approved vendor list (AVL). DIMMs from this list have been extensively tested on AMD-751 based platforms and qualified for usage. Please consult your OEM or AMD specialist for details. 2. Vendors developing new AMD-751 based motherboards should implement pulldown resistors on the MAA[14:0] and MAB[14:0] address buses ...
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... Bit Reset This read-only value of 7006h represents the AMD-751 system controller single processor device. Revision ID Bit 7 6 Reset — — Bits 7–0 AMD-751™ System Controller Revision Code (RO) - The most-significant nibble indicates the die revision and the least-significant nibble represents the stepping. (For example, 00h = Revision A0; 01h = Revision A1 ...
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... Technical and Documentation Support 4.1 Documentation Support The following documents provide additional information regarding the operation of the AMD-751 system controller: AMD-751™ System Controller Data Sheet (order# 21910) AMD-756™ Peripheral Bus Controller Data Sheet (order# 22548) AMD Athlon™ System Bus Specification (order# 21902) AMD Athlon™ ...