At 01:46 PM 6/15/96 -0400, Warren wrote:

Jim;

I was under the impression that a fuseable link was literally a piece of conductive material that you deliberatley 'blow-away' - In most cases, couldn't you simply 'tap into' the data side of the fuse, and download the info??

If it really is a "fusible link," that usually means a fuse, analogous to the much larger kinds used for circuit protection. There are also "anti-fuses" which are high-resistance silicon links which on the application of a relatively high voltage, become low-resistance. However, besides this, there is the typical EPROM-type cell, which can be programmed but not erased electrically. (I'm ignoring cells like EEPROM which are designed and constructed to be electrically erased.) As long as the chip contains most of its information in EPROM, that means that the chip was fabbed with a EPROM-compatible process, so they'd be more likely to include read-protection in EPROM as well. Jim Bell jimbell@pacifier.com