lecture17 - Lecture 17: Memories (SRAM) EECS 312 Reading:...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
EECS 312 1 Lecture 17: Memories (SRAM) EECS 312 Reading: 12.1.2 (exclude pgs 632- 633), 12.2.3
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Last Time EECS 312 2 • Read-only memories (ROMs) – Permanent -- take away power and stored state remains – Structural changes reflect stored data (transistor connected or not) • Non-volatile read-write memories – Rely on specialized device architectures to allow for re-writing – Typically slow re-write mechanism
Background image of page 2
Lecture Overview EECS 312 3 • Read-write memories (volatile) – Random access memory (RAM) – Static (think static logic)
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Generic Memory Structure EECS 312 4
Background image of page 4
Memory Architecture: Decoders EECS 312 5 Word 0 Word 1 Word 2 Word N-1 Word N-2 Input-Output S 0 S 1 S 2 S N-2 S N_1 (M bits) Storage Cell M bits N W or ds Word 0 Word 1 Word 2 Word N-1 Word N-2 Input-Output (M bits) Storage Cell M bits De co de r A 0 A 1 A K-1 S 0 N words => N select signals Too many select signals Decoder reduces # of select signals K = log 2 N
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Array-Structured Memory Architecture EECS 312 6 Problem: ASPECT RATIO or HEIGHT >> WIDTH
Background image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/01/2008 for the course EECS 312 taught by Professor Maharbiz during the Fall '07 term at University of Michigan.

Page1 / 18

lecture17 - Lecture 17: Memories (SRAM) EECS 312 Reading:...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online