M27C322 in 8Bit mode

[Farid]

M27C322 has A0 ~ A20 and D0 ~ D15 so it is 2MB x 16bit
But I want to use it in 8bit mode (2MB x 8bit), so I just ignore D8 ~ D15 pins completely
For now I am programming it with a custom adapter :



And I select 27C080 in the software
27C080 has A0 ~ A19 and D0 ~ D7 and it is 1MB x 8bit
27C080 doesn't have any A20, so I have to control it manually
So I program the chip two times, first time I connect A20 to GND and second time to 5v
And it works fine

Now my question :
Is there any way to control A20 automatically and program the chip only one time?
In other word I need to select an EPROM in the software which has A0 ~ A20 and D0 ~ D7, is there such a chip?
Thanks in advance

[Ezo]

Mentioned chip organized 16bit only, no 8bit option

[Farid]

First of all thanks for the answer
But it seems you didn't get the point, I am using this chip in 8bit mode and it works fine.
If you don't use D8 ~ D15 data lines, the chip will be 8bit.
And yeah I know by doing so the half of the chip goes waste, but it is ok with me!

I am trying to find a better and faster way to program the chip for 8bit usage.
The obvious method is to select M27C322 in the software and tie the zif socket and J4 pins to the chip (pin to pin) and program a 4MB bin file (2MB Data + 2MB of 00) but this method will take too long to program, and I think it will take double amount of time as the following method.

What do you think about this method :
To program a 2MB data bin file to M27C322, I want to select M27C160 in the software and use this wiring :



I am not just sure about VPP line of zif socket which will be floating, is this ok?
Also when I program the chip I tie D8 ~ D15 to GND, do I have to tie them to GND when I use it (Read mode) or just leave them floating?

Thanks in advance

[Farid]

It seems VPP line of 27C160 isn't compatible with 27C322.
But VPP line of 27C801 is compatible with 27C322 :



So I think wiring is not enough and I have to adjust the DIP switch too :

27C322 :


27C160 :


27C801 :


But how exactly should I adjust the DIP switch?

[Ezo]

look on zif32 and dipswitch extended schematic

[Farid]

Thanks for the schematic, it is very helpful
So I think I have to select 27C160 in the software, but I have to set the DIP switch according to 27C801
The wiring can also be improved as well, by applying a jumper to Pin2 and Pin3 of J4, pin 1 of zif will be A19 (instead of VPP), and I need only one wire to get A20 from J4
Please confirm these setting, as I don't want to fry anything!

[Ezo]

I suppose to use 27C322 for programming as original 16bit chip device where source file modified 32 Mb with low byte as target, high byte n/a or any.You can't use reduced file size in sw.

[Ronaldcymn]

Rey Gill from Oceanside was looking for professional academic essay ghostwriter sites au

Zackary Carroll found the answer to a search query professional academic essay ghostwriter sites au


ESSAYERUDITE.COM





professional academic essay ghostwriter sites au










pages business plan template
john dryden essay of dramatick poesie summary
example comparative poetry essay
ending a cover letter for a resume
abstract art essay sample
popular application letter editing site for masters
popular dissertation chapter ghostwriters site usa
lemony snickets book report free
into the forest jean hegland essay
write family and consumer science creative writing
accuplacer writing essay examples
free resume writing services india
argumentetive essay about liveng in city and living in country
concrete ready mix service business plan bundle
wheaton career services resume
cheap dissertation hypothesis writing site au
essay grading algorithm
best dissertation hypothesis ghostwriting websites ca
sample resume manager assistant
college admissions statement essay
esl sample compare and contrast essays
write me custom school essay on founding fathers
proposal for revising the dissertation in preparation for publication
madison rodriguez page resume
grade 8 homework
project manager construction resume examples
free essays on childhood obesity
should you add a cover letter to your resume
essays about english language teaching
how to write a biographical sketch for college
professional cv ghostwriting sites au
do my popular school essay on usa
sample resume phd physics
professional report ghostwriter website usa
college scholarship essay competitions
avoiding wordiness academic writing
popular critical thinking editing site for mba
english proofreading sites
if i were an engineer essay
good phrases to use on a resume
how to write a good mad libs
cheap school home work samples
how to write script in wincc flexible
cambridge mba essay tips
professional cheap essay writers sites for phd
essay statement for college
cover letter sales amp marketing manager
small business plan template south africa
derivatives resume
basketball head coach resume sample
classroom assistant cover letter
icu rn job resume
essay paper on managing operations
benefits of international trade essay
write dissertation hypothesis
il essaye de
write a good small claims complaint
write my best annotated bibliography online
descriptive essay about favorite things
the house of bernarda alba + essays
esl critical thinking editing service au
cheap movie review editing site au
how to write an application for casual leave
dissertation topics in information technology management
payroll coordinator resume
healthcare resume examples
broilers manure thesis study
write me history critical thinking
doc resume fresher
self-reliance and other essays cliff notes
macroeconomics essay
popular university essay ghostwriting site usa
www essay paper net
essay first love
resume letter of introduction samples
cheap bibliography ghostwriter sites online
resume meet deadlines
cheap essays ghostwriting for hire for mba
help writing cheap descriptive essay on civil war
want debutante essay

free term papers on business proposals
how to write nice comments
radio promotion assistant resume
how to write training courses
writing service legal
is graffiti art or vandalism essay
professional papers editor services for school
if you could have any job in the world essay
what is a memoir essay