AM486

PRELIMINARY Am486® DX4 3-Volt Processor Advanced Micro High-Performance, Clock-Selectable, 3.3 V, 32-Bit Microprocessor Devices DISTINCTIVE CHARACTERISTICS Operating voltage range 3.3 V ± 0.3 V — 120-MHz operating frequency uses a 40-MHz external bus — 100-MHz operating frequency uses a 33-MHz external bus — Wide range of chipsets and support available through the AMD FusionPCSM Program High Integration On-Chip — 8-Kbyte code and data cache — Floating-point unit — Paged, virtual memory management High-Performance Design — Frequent instructions execute in one clock — 105.6-Million bytes/second burst bus at 33 MHz — 128-Million bytes/second burst bus at 40 MHz — 0.5-micron CMOS process technology — Dynamic bus sizing for 8, 16, and 32-bit buses Complete 32-Bit Architecture — Address and data buses — All registers — 8, 16, and 32-bit data types Multiprocessor Support — Multiprocessor instructions — Cache consistency protocols — Support for second-level cache Standard 168-Pin PGA Package Supports Environmental Protection Agency’s (EPA) “Energy Star” program — Energy management capability provides excellent base for energy-efficient design — Works with a variety of energy efficient, power managed devices GENERAL DESCRIPTION The Am486DX4 microprocessor is a high-performance 486 desktop solution that provides optimal price/performance for high-end 486 power-managed systems. The Am486DX4 CPU offers superior local bus graphics performance for Microsoft® Windows®. Using AMD’s sp...