Memory Array Architecture

memory cell array 2m k-bit words per row n m 2n rows k bits wide k bitsword 2n by 2mk bits Addressing a memory Want square memory array Want simple decoding logic - Problem A 1Meg1 RAM uses 1,048,576 20-input NANDs? Want short data amp address lines

Semiconductor Memory Classification, Memory Timing Definitions, Memory Architecture, Array-Structured Memory Architecture, Hierarchical Memory Architecture, 6T SRAM, 3-Transistor DRAM Cell, 1-Transistor DRAM Cell, Read-Only Memory, Programming the ROM, Programming the ROM, Fuse PROM.

II. MEMORY ARCHITECTURE Memory Architecture describes the methods used to implement data storage in a manner that is a combination of the fastest, most reliable, most durable, and least expensive way to store and collect the information. The data storage structure, consists of individual memory cells arranged in an array of horizontal rows and

Memory Arrays SRAM Architecture - SRAM Cell - Decoders - Column Circuitry - Multiple Ports Serial Access Memories 19 SRAM CMOS VLSI DesignCMOS VLSI Design 4th Ed. 3 Memory Arrays Memory Arrays Random Access Memory Serial Access Memory Content Addressable Memory CAM ReadWrite Memory RAM Volatile Read Only Memory

RAM memory cells and cell arrays Static RAM-more expensive, but less complex Tree and Matrix decoders-needed for large RAM chips Dynamic RAM-less expensive, but needs quotrefreshingquot Chip organization Timing ROM-Read only memory Memory Boards Arrays of chips give more addresses andor wider words

Array Architecture 2n words of 2m bits each If n gtgt m, fold by 2k into fewer rows of more columns Good regularity - easy to design Very high density if good cells are used row decoder column decoder n n-k k 2m bits column circuitry bitline conditioning memory cells 2n-k rows x 2mk columns bitlines wordlines D. Z. Pan 14

SRAM Architecture Vishal Saxena, Boise State University Multiple Ports Serial Access Memories. Vishal Saxena-3-Memory Arrays Memory Arrays Random Access Memory Serial Access Memory Content Addressable Memory CAM ReadWrite Memory RAM Volatile Read Only Memory ROM Nonvolatile Static RAM SRAM Dynamic RAM DRAM Shift Registers Queues

A memory array is defined as a two-dimensional array of memory cells used in digital systems to efficiently store large amounts of data. It consists of rows and columns where each row, known as a word, contains data that can be read or written based on a specified address. An outline of the architecture body containing the memory array is

Memory Architectures with multi bit elements. We are usually not interested in addressing single bits, dependent on the surrounding architecture the size of a single memory elements is usually 83264 bit. We introduce a new symbol for a 8bit Memory element 8bit Memory Element. There are different ways on how to implement the Address Decoder.

Array-Structured Memory Architecture Input-Output M bits Row Decoder AK AK1 AL-1 2L-K Column Decoder Bit Line Word Line A0 AK-1 Storage Cell Sense Amplifiers Drivers Only 1 layer contact mask is used to program memory array Programming of the memory can be delayed to one of last process steps. Memories and Arrays Digital Integrated