CONTROLLER PCMC. 82434NX Datasheet

82434NX Datasheet PDF, Equivalent


Part Number

82434NX

Description

PCI/ CACHE AND MEMORY CONTROLLER PCMC

Manufacture

Intel Corporation

Total Page 30 Pages
PDF Download
Download 82434NX Datasheet


82434NX Datasheet
82434LX 82434NX PCI CACHE AND MEMORY
CONTROLLER (PCMC)
Y Supports the PentiumTM Processor at
iCOMPTM Index 510T60 MHz and iCOMP
Index 567T66 MHz
Y Supports the Pentium Processor at
iCOMP Index 735T90 MHz iCOMP Index
815T100 MHz and iCOMP Index 610T75
MHz
Y Supports Pipelined Addressing
Capability of the Pentium Processor
Y The 82430NX Drives 3 3V Signal Levels
on the CPU and Cache Interfaces
Y High Performance CPU PCI Memory
Interfaces via Posted Write and Read
Prefetch Buffers
Y Fully Synchronous PCI Interface with
Full Bus Master Capability
Y Supports the Pentium Processor
Internal Cache in Either Write-Through
or Write-Back Mode
Y Programmable Attribute Map of DOS
and BIOS Regions for System
Flexibility
Y Integrated Low Skew Clock Driver for
Distributing Host Clock
Y Integrated Second Level Cache
Controller
Integrated Cache Tag RAM
Write-Through and Write-Back Cache
Modes for the 82434LX
Write-Back for the 82434NX
82434NX Supports Low-Power Cache
Standby
Direct Mapped Organization
Supports Standard and Burst SRAMs
256-KByte and 512-KByte Sizes
Cache Hit Cycle of 3-1-1-1 on Reads
and Writes Using Burst SRAMs
Cache Hit Cycle of 3-2-2-2 on Reads
and 4-2-2-2 on Writes Using
Standard SRAMs
Y Integrated DRAM Controller
Supports 2 MBytes to 192 MBytes of
Cacheable Main Memory for the
82434LX
Supports 2 MBytes to 512 MBytes of
Cacheable Main Memory for the
82434NX
Supports DRAM Access Times of
70 ns and 60 ns
CPU Writes Posted to DRAM 4-1-1-1
Refresh Cycles Decoupled from ISA
Refresh to Reduce the DRAM
Access Latency
Six RAS Lines (82434LX)
Eight RAS Lines (82434NX)
Refresh by RAS -Only or CAS-
Before-RAS in Single or Burst
of Four
Y Host PCI Bridge
Translates CPU Cycles into PCI Bus
Cycles
Translates Back-to-Back Sequential
CPU Memory Writes into PCI Burst
Cycles
Burst Mode Writes to PCI in Zero PCI
Wait-States (i e Data Transfer Every
Cycle)
Full Concurrency Between CPU-to-
Main Memory and PCI-to-PCI
Transactions
Full Concurrency Between CPU-to-
Second Level Cache and PCI-to-Main
Memory Transactions
Same Cache and Memory System
Logic Design for ISA and EISA
Systems
Cache Snoop Filter Ensures Data
Consistency for PCI-to-Main Memory
Transactions
Y 208-Pin QFP Package
Other brands and names are the property of their respective owners
December 1994
Order Number 290479-004

82434NX Datasheet
82434LX 82434NX
This document describes both the 82434LX and 82434NX Unshaded areas describe the 82434LX
Shaded areas like this one describe 82434NX operations that differ from the 82434LX
The 82434LX 82434NX PCI Cache Memory Controllers (PCMC) integrate the cache and main memory
DRAM control functions and provide bus control for transfers between the CPU cache main memory and the
PCI Local Bus The cache controller supports write-back (or write-through for 82434LX) cache policy and
cache sizes of 256-KBytes and 512-KBytes The cache memory can be implemented with either standard or
burst SRAMs The PCMC cache controller integrates a high-performance Tag RAM to reduce system cost
2


Features Datasheet pdf 82434LX 82434NX PCI CACHE AND MEMORY CON TROLLER (PCMC) Y Supports the Pentium TM Processor at iCOMP TM Index 510T60 M Hz and iCOMP Index 567T66 MHz Supports the Pentium Processor at iCOMP Index 73 5T90 MHz iCOMP Index 815T100 MHz and iC OMP Index 610T75 MHz Supports Pipelined Addressing Capability of the Pentium P rocessor The 82430NX Drives 3 3V Signal Levels on the CPU and Cache Interfaces High Performance CPU PCI Memory Interf aces via Posted Write and Read Prefetch Buffers Fully Synchronous PCI Interfac e with Full Bus Master Capability Suppo rts the Pentium Processor Internal Cach e in Either Write-Through or Write-Back Mode Programmable Attribute Map of DOS and BIOS Regions for System Flexibilit y Integrated Low Skew Clock Driver for Distributing Host Clock Integrated Seco nd Level Cache Controller Integrated Ca che Tag RAM Write-Through and Write-Bac k Cache Modes for the 82434LX Write-Bac k for the 82434NX 82434NX Supports Low- Power Cache Standby Direct Mapped Organization Supports Standar.
Keywords 82434NX, datasheet, pdf, Intel Corporation, PCI/, CACHE, AND, MEMORY, CONTROLLER, PCMC, 2434NX, 434NX, 34NX, 82434N, 82434, 8243, Equivalent, stock, pinout, distributor, price, schematic, inventory, databook, Electronic, Components, Parameters, parts, cross reference, chip, Semiconductor, circuit, Electric, manual, substitute




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