EEPROM Addresses

MJG2514

···· Hello Everyone,

····················· I have been working on experiments with EEPROM's. I am connecting a BS2px to a 24LC32. In the Stampworks Manual, it is stated that this 32K has 4096 address (pg. 186). How do you determine the number of addresses in an EEPROM? I would like to figure out the number of addresses in a·256K EEPROM.

························································································ Thanks,
································································································· Mark

Mike Green

EEPROMs are labelled in terms of the number of bits provided, so the 24LC32 has 32K bits which comes out to 4K bytes. These are always byte addressed these days, so there are 4K addresses. Once upon a time there were ROMs and PROMs and other alphabet soup that were bit addressed or nibble addressed as well.

So, a 24LC256 has 256K bits which comes out to 32K bytes and each byte has an address.

Just to complicate matters, you'll occasionally find a part number that's one off, like a 24C1025. This actually has 1024K bits or 128K bytes