EPROM Switch

Guest
Hello all I have a small project I have been working on and need a
little help. I have a board with a 27c160 bios chip on it and I need to
be able to switch the bios back and forth between two version. Its not
easy to change the chip because its under a few things. So I made a
extention for it. Its a socket with a ribbon cable to a pcb with two
27c160's and a ribbon pin header for each chip. I just move the ribbon
cable back and forth as I need. What I would like to do is add a
function switch. I just dont know what pins need to be turned on/off.
Any help would be great.

Thanks,
Keith
 
<keithelliott95@adelphia.net> schreef in bericht
news:1127490985.971938.141440@f14g2000cwb.googlegroups.com...
Hello all I have a small project I have been working on and need a
little help. I have a board with a 27c160 bios chip on it and I need to
be able to switch the bios back and forth between two version. Its not
easy to change the chip because its under a few things. So I made a
extention for it. Its a socket with a ribbon cable to a pcb with two
27c160's and a ribbon pin header for each chip. I just move the ribbon
cable back and forth as I need. What I would like to do is add a
function switch. I just dont know what pins need to be turned on/off.
Any help would be great.

Thanks,
Keith
Click to expand...
If the chip has a CE (Chip Enable) or CS (Chip Select) this pin would do the
trick.
Just make one the inverse of the other!

Alexander
 
<keithelliott95@adelphia.net> schreef in bericht
news:1127494190.654181.49590@z14g2000cwz.googlegroups.com...
Thats what I am hopeing I just need to know what pin it would be.
Click to expand...
Seriously lack of information!!!

All I can say is RTFM.


http://www.st.com/stonline/products/literature/ds/2382/m27c160.pdf
 
I know I had a lack of information thats why I asked for help. I was
looking for a manual and could not find one. Thanks for the link thats
all I needed.
 
On 2005-09-23, keithelliott95@adelphia.net <keithelliott95@adelphia.net> wrote:
Hello all I have a small project I have been working on and need a
little help. I have a board with a 27c160 bios chip on it and I need to
be able to switch the bios back and forth between two version. Its not
easy to change the chip because its under a few things. So I made a
extention for it. Its a socket with a ribbon cable to a pcb with two
27c160's and a ribbon pin header for each chip. I just move the ribbon
cable back and forth as I need. What I would like to do is add a
function switch. I just dont know what pins need to be turned on/off.
Any help would be great.
Click to expand...

if it's got it switch the chip-select line.


Bye.
Jasen
 
On 2005-09-23, keithelliott95@adelphia.net <keithelliott95@adelphia.net> wrote:
I know I had a lack of information thats why I asked for help. I was
looking for a manual and could not find one. Thanks for the link thats
all I needed.
Click to expand...
next time google for spec+<number-of-chip>

Bye.
Jasen
 
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