Chapter 12 Memory DevicesINC222 Logic Theory and Digital Circuit Design
General Memory Operation Select the address in memory Select read / write operation Supply the input data (write) Hold the output data (read) Enable / disable the memory
Chapter 12 Memory DevicesINC222 Logic Theory and Digital Circuit Design
Address Inputs
The R/W Input
Memory Enable
Chapter 12 Memory DevicesINC222 Logic Theory and Digital Circuit Design
Chapter 12 Memory DevicesINC222 Logic Theory and Digital Circuit Design
CPU-Memory Connections
Chapter 12 Memory DevicesINC222 Logic Theory and Digital Circuit Design
Read-Only Memory (ROM)
Chapter 12 Memory DevicesINC222 Logic Theory and Digital Circuit Design
The Read Operation
Chapter 12 Memory DevicesINC222 Logic Theory and Digital Circuit Design
ROM Architecture Register
Array
Address Decoders
Output Buffers
Chapter 12 Memory DevicesINC222 Logic Theory and Digital Circuit Design
ROM Timing
Chapter 12 Memory DevicesINC222 Logic Theory and Digital Circuit Design
Types of ROMs
Chapter 12 Memory DevicesINC222 Logic Theory and Digital Circuit Design
Mask-Programmed ROM
Chapter 12 Memory DevicesINC222 Logic Theory and Digital Circuit Design
Programmable ROMs (PROMs)
Chapter 12 Memory DevicesINC222 Logic Theory and Digital Circuit Design
Erasable Programmable ROM (EPROM)
Chapter 12 Memory DevicesINC222 Logic Theory and Digital Circuit Design
Electrically Erasable PROM (EEPROM)
Chapter 12 Memory DevicesINC222 Logic Theory and Digital Circuit Design
CD ROM
Chapter 12 Memory DevicesINC222 Logic Theory and Digital Circuit Design
Flash Memory
Chapter 12 Memory DevicesINC222 Logic Theory and Digital Circuit Design
The 28F256A CMOS Flash Memory IC
Chapter 12 Memory DevicesINC222 Logic Theory and Digital Circuit Design
Chapter 12 Memory DevicesINC222 Logic Theory and Digital Circuit Design
ROM Applications Firmware
Bootstrap Memory
Data Tables
Data Converter
Function Generator
Auxiliary Storage
Chapter 12 Memory DevicesINC222 Logic Theory and Digital Circuit Design