Content addressable memory

[manosubha]

thanks for reply.but in my content addressable memory circuit input will be data and output will be address.then whats the use of address decoder there

[Papabravo]

Originally Posted by manosubha

thanks for reply.but in my content addressable memory circuit input will be data and output will be address.then whats the use of address decoder there

An excellent question. A CAM actually has two fields called TAG and DATA. The TAG is the field that is matched to the incoming data, but the DATA field is the output of the CAM. There is usually an auxiliary bit that tells you if there is a match or a no match in the TAG field.

The matching of the TAG to the input needs to be done in parallel with all of the cells in the CAM so I don't see how the concept of an address is useful in this context. Maybe you have some additional information you can share with us.

[beenthere]

This was a hijack of - http://forum.allaboutcircuits.com/sh...ad.php?t=34987