AM486DX2 Datasheet | AMD

DESCRIPTION The Am486DX2 processor operates with a 1x clock input. This 1x clock simplifies system design by reducing the clock frequency required by external devices. The m o c . u 4 t e e h s a t a .d w w w This document contains information on a product under development at Advanced Micro Devices. The information is intended to help you evaluate this product. AMD reserves the right to change or discontinue work on this proposed product without notice. Publication# 19200 Rev: D Amendment/0 Issue Date: August 1995 .. The clock-doubled Am486DX2 processor is a high-performance 486 desktop solution that provides optimal price/performance for high-end 486 power-managed systems. The Am486DX2 CPU offers superior local bus graphics performance for Microsoft® Windows®. 1x clock also reduces RF emission and simplifies clock generation. The input signal is doubled internally to achieve the maximum 2x operating frequency. The phases of the core clock are controlled by an internal Phase Lock Loop (PLL) circuit. PRELIMINARY BLOCK DIAGRAM Am486 CPU Pipelined 32-Bit Microarchitecture VOLDET 64-Bit Interunit Transfer Bus 32-Bit Data Bus 32 32-Bit Data Bus 32 Linear Address Bus Base/ Index Bus 32 ALU 32 PCD, PWT Segmentation Unit Descriptor Registers Limit and Attribute PLA 2 Paging Unit 20 Physical Address 8-Kbyte Cache Cache Unit 32 32 32 Core Clock Power Planes VC , VS C S CLKMUL Clock Multiplier Barrel Shifter Register File Address Drivers Bus Interface A31- A2, BE3- BE0 Write Buffers 4 x 80 Data Bus Transceivers D31- D0 Translation Lookaside Buffer 128 Micro-instruction Displacement Bus 32 Code Stream Floating Point Unit Floating Point Register File Central and Protection Test Unit Decoded Instruction Path Instruction Decode 24 32-byte Code Queue 2 x 16 bytes Prefetcher Bus Control...