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AM486DE2 Dataheets PDF



Part Number AM486DE2
Manufacturers AMD
Logo AMD
Description 8K Write Through Embedded Microprocessor
Datasheet AM486DE2 DatasheetAM486DE2 Datasheet (PDF)

FINAL Am486®DE2 8-Kbyte Write-Through Embedded Microprocessor DISTINCTIVE CHARACTERISTICS s High-Performance Design — 66-MHz operating frequency — Frequent instructions execute in one clock — 105.6-million bytes/second burst bus at 33 MHz — Flexible write-through address control — Dynamic bus sizing for 8-, 16-, and 32-bit buses — Soft reset capability s High On-Chip Integration — 8-Kbyte unified code and data cache — Floating-point unit — Paged, virtual memory management s Enhanced System and .

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FINAL Am486®DE2 8-Kbyte Write-Through Embedded Microprocessor DISTINCTIVE CHARACTERISTICS s High-Performance Design — 66-MHz operating frequency — Frequent instructions execute in one clock — 105.6-million bytes/second burst bus at 33 MHz — Flexible write-through address control — Dynamic bus sizing for 8-, 16-, and 32-bit buses — Soft reset capability s High On-Chip Integration — 8-Kbyte unified code and data cache — Floating-point unit — Paged, virtual memory management s Enhanced System and Power Management — Stop clock control for reduced power consumption — Industry-standard, two-pin System Management Interrupt (SMI) for power management independent of processor operating mode and operating system — Static design with Auto Halt Power-Down support — Wide range of chipsets supporting SMM available to allow product differentiation s Complete 32-Bit Architecture — Address and data buses — All registers — 8-, 16-, and 32-bit data types s Standard Features — 3-V core with 5-V-tolerant I/O — Binary compatible with all Am486® DX and Am486DX2 microprocessors — Wide range of support available through the AMD® FusionE86SM Program s IEEE 1149.1 JTAG Boundary-Scan Compatibility s Supports Environmental Protection Agency's Energy Star program — 3-V operation reduces power consumption up to 40% — Energy management capability provides an excellent base for energy-efficient design — Works with a variety of energy-efficient, powermanaged devices www.DataSheet4U.com s 208-Lead SQFP or 168-Pin PGA Package GENERAL DESCRIPTION The Am486DE2 microprocessor is an addition to the AMD Am486 microprocessor family. The Am486DE2 enhances system performance by incorporating flexible clock control and enhanced SMM. The Am486DE2 CPU clock control feature permits the CPU to be stopped under controlled conditions, allowing reduced power consumption during system inactivity. The SMM function is implemented with an industry-standard, two-pin interface. w w w . t a d h s a t e e . u 4 m o c Publication ID 20037 Revision A Amendment /0 Issue Date April 1996 www.DataSheet4U.com BLOCK DIAGRAM Power Plane Clock Interface 32-Bit Data Bus 32-Bit Data Bus 32-Bit Linear Address PCD, PWT VOLDET VCC, VSS Clock Generator CLK STPCLK Bus Interface Cache Unit 32 Address Drivers Write Buffers 4x32 Copyback Buffers 4x32 Writeback Buffers 4x32 Barrel Shifter Register File ALU 24 Segmentation Unit Descriptor Registers Limit and Attribute PLA Paging Unit 24 Translation Lookaside Buffer 2 A31–A2 BE3–BE0 Physical Address Physical Address 8-Kbyte Cache 128 Displacement Bus Micro-instruction Prefetcher 32 Code 32-Byte Stream Code Queue 32 Data Bus Transceivers D31–D0 ADS, W/R, D/C, M/IO, PCD, PWT, RDY, LOCK, PLOCK, BOFF, A20M, BREQ, HOLD, HLDA, RESET, INTR, NMI, FERR, UP, IGNNE, SMI, SMIACT, SRESET BRDY, BLAST BS16, BS8 FloatingPoint Unit FloatingPoint Register File Central and Protection Test Unit Decoded Instruction Path 2x16 Bytes Instruction Decode 24 Bus Control Request Sequencer Control ROM Burst Bus Control Bus Size Control Cache Control KEN, FLUSH, AHOLD, CACHE, EADS, INV, WB/WT, HITM Parity Generation and Control JTAG PCHK, DP3–DP0 TDI, TCK, TDO, TMS 2 Am486DE2 Microprocessor ORDERING INFORMATION Standard Product AMD standard products are available in several packages and operating ranges. Valid order numbers are formed by a combination of the elements below. Am486 DE2 –66 V 8 T H C TEMPERATURE RANGE C = Commercial PACKAGE TYPE H = 208-Lead SQFP G= 168-Pin PGA CACHE TYPE T = Write-through CACHE SIZE 8 = 8 Kbyte VOLTAGE V = VCC is 3 V with 5-V tolerance SPEED OPTION –66 = 66 MHz VERSION DE2 = Clock-doubled with FPU DEVICE NUMBER/DESCRIPTION Am486 high-performance CPU Valid Combinations Valid Combination Am486DE2-66V8THC Am486DE2-66V8TGC Comment SQFP package PGA package Valid combinations list configurations planned to be supported in volume for this device. Consult the local AMD sales office to confirm availability of specific valid combinations and to check on newly released combinations. Am486DE2 Microprocessor 3 Table of Contents Distinctive Characteristics ............................................................................................................................ 1 General Description...................................................................................................................................... 1 Block Diagram .............................................................................................................................................. 2 Ordering Information .................................................................................................................................... 3 Connection Diagrams and Pin Designations................................................................................................ 7 168-Pin Grid Array (PGA) Package ....................................................................................


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