Re: EEPROM Circuit?

[mjmahon@aol.com (Michael J. Mahon)]

Glenn Jones replied:

>> In general, byte-wide EEPROMs are much simpler to
>> interface to a byte-wide bus--in fact the Apple bus has
>> most of the decoding done for you.
>>
>> -michael
>>
>> Check out amazing quality sound for 8-bit Apples on my
>> Home page:  http://members.aol.com/MJMahon/
>
>Thanks for the info  .. I was trying to keep the physical size
>of the chip to a minimum and serial eeproms tend to be very
>small compared to byte wde eeproms that require 8 data lines
>plus address etc
>
>given what you just said .. the combined size of the additional glue
>to access as serial eeprom might end up being equivilent or larger
>than a byte wide eeprom

That is true, unless you happen to have some unused I/O
pins around, plus some firmware/software space to control them.

Many microcontrollers include some EEPROM for program
and parameter storage--maybe the one on the ethernet module
is one of them.

-michael

Check out amazing quality sound for 8-bit Apples on my
Home page:  http://members.aol.com/MJMahon/