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mmAMC7's avatar
mmAMC7
Icon for New Contributor rankNew Contributor
6 years ago

EPM7128E read and programming

Thanks for your quick response Are you referring to the security fuse? yes i am referring to it. Quetion: If the security fuse is set, We wouldn't can get read and store the pogramming from the ch...
ak6dn's avatar
ak6dn
Icon for Regular Contributor rankRegular Contributor
6 years ago

You keep posting the same question in different forum headings.

(1) If the chip you have is marked EPM7128E AND it has its security fuse set, you CANNOT read it. End of story. You can ONLY erase and reprogram it. In any event you will need a programmer that handles the device (like the EEtools TopMax series) with the CORRECT PLCC84 adapter. The -E device can only be programmed out of circuit.

(2) You can't arbitrarily try and access the device as an EPM7128S (which is JTAG, in-circuit programmable) if the chip is marked EPM7128E. The -S series is an updated version of the -E series which has JTAG in-circuit programmability.