[SOLVED] information about eFuse and EEPROM

I am to the embedded sytem and need some help from you masters.:smile:

Can you just tell me

1) what is eFuse?
2) efuse has anything to do with EEPROM ? if yes what is that?
3) Can we use eFuse code to read and write into EEPROM?

Please help me out ASAP.

1. It's a fuse just like the one in a power cord but much smaller and embeddd into an IC. They are links which can be 'burned out' just like a conventional fuse which means they can't be reset afterwards. They are not used to protect circuitry though, they are used to configure it in a way that can't be reversed. For example, they could be used to permanently store a serial number inside an IC or in some cases, change the way it operates. Another example: some devices fail tests after manufacture becasue one or more sections do not meet specification, in these the faulty section could be disabled and the IC rebranded as a part without that feature.

2. Very little, except maybe as mentioned in 1. There are PROMs (note: not erasable) which are made from am array of fuses which are similar in the way they work.

3. eFuse isn't a program so no, it can't.

Brian.

Thank you so much for you help.