I have to repair the circuit board that has failed EPM7128 on board and there is port ISP 10 pins ,so I think it can be program ,so I made the circuit Byteblaster and used Quartus II Programmer & Max+plus .The program can auto detected EPM7128 but I cannot read and copy to the new one. How can I copy to the new one?
(The circuit board is CISCO 1721 and I have the good one ,And Card WIC 1ENET that use EPM7064)
Hi;
I used EPM7128 in some of my hardware's design.
I realize that in some of my circuits IC can not program with 5Volt supply!
when i reduce power supply voltage down to 4.2 Volt programming start.
because of this, you can try programming with this voltage.