Programmable rom (prom) , Basic Computer Science

Assignment Help:

PROGRAMMABLE ROM (PROM):

The user can program a PROM after purchase.  Each memory bit element in the PROM contains a nichrome or silicon link that acts as a fuse.  The user can selectively 'but out' or 'blow' these fuses by applying pulses of current to the appropriate pins of the IC.  A memory element with a non-ruptured fuse stores a 1 and a ruptured fuse stores a 0.  The programming is irreversible, so it must be right first time.  Figure 11 shows the circuit for a PROM.

596_prom.png

PROM Circuit

PROMs are capable of high operating speeds, but consume a relatively large amount of power.  However, since they are non-volatile, they can be switched off when not being accessed. 

 


Related Discussions:- Programmable rom (prom)

Use triggers to maintain referential integrity, At times, Brewbean''s has c...

At times, Brewbean''s has changed the id number for existing products. In the past, they have had to add a new product row with the new id to the BB_PRODUCT table, modify all the c

C, board coloring

board coloring

Computer network.., what is the difference between internet and world wide ...

what is the difference between internet and world wide web?

Cryptography, Consider the one-time pad encryption scheme to encrypt a 1-bi...

Consider the one-time pad encryption scheme to encrypt a 1-bit message m, and assume m is chosen with uniform distribution from message space M={0,1}. Let E1 be the event "message

Types of operating systems, Operating Systems:  An operating system is a se...

Operating Systems:  An operating system is a set of programs that manage computer hardware resources and provide common services for application software.  There are following kind

Database reports, The first report, Report #1, is to be an ordered list of ...

The first report, Report #1, is to be an ordered list of the contents of the database, sorted in ascending order by a major field. Report #1 is to include all of the fields and rec

Many to many relationships, Each Many to Many relationship type maps into t...

Each Many to Many relationship type maps into the Table. The primary key of this relevant is the combination of the primary keys of the participating entity types. These are also c

Artificial intelligence-specifying search problems, Specifying Search Probl...

Specifying Search Problems In our agent expressions, a problem to be solved is a specific task where the agent starts with the atmosphere in a given state and acts upon the env

Principal structures in flow charting, PRINCIPAL STRUCTURES IN FLOW CHARTIN...

PRINCIPAL STRUCTURES IN FLOW CHARTING Structured programing calls for the usage of four principal structures to help simplify the program. They are:     Sequential contro

Internet searching algorithm, Internet searching algorithm: Searching: Wh...

Internet searching algorithm: Searching: When a user enters a query into a search engine, the engine examines its index and provides a listing of best-matching web pages accordin

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd