Re: 27cxxx eprom switcher
- From: "martin.shoebridge" <ms@xxxxxxxxxxxxx>
- Date: Thu, 08 Feb 2007 11:07:56 GMT
"mark krawczuk" <krawczuk65@xxxxxxxxxxx> wrote in message
news:45ca3720$0$83734$c30e37c6@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
hi , can anyone point me in the right direction for a eprom switcherSensibly now, Yes you can just switch the MSB on a 256, but I wouldn't
schematic ?
this is what i want to do :
i have a engine ecu which contains a 27c128 eprom , i want to be able
to switch between 2 .bin files (maps) while the engine is running i.e
on the fly . i presume i will have to use a 27c256 eprom .?
any help appreciated.
mark k
advise doing it while the engine is running.You will probably crash the ECU,
maybe damage the engine?. Absolutely no problem doing it with the engine
off....
If the eprom just contains a map, and no CPU executables, then you could do
it with the engine running ( your risk!) but you would need to synchronise
the switch with some logic with the CPU. Put the switch input onto the D of
a D type and clock it with one of the system clocks from the CPU.....
.
- References:
- 27cxxx eprom switcher
- From: mark krawczuk
- 27cxxx eprom switcher
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