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MJaco2's avatar
MJaco2
Icon for New Contributor rankNew Contributor
7 years ago

How to program EPM240 externally, not in-system

I want to make a simple programmer for EPM240 (to be placed in a ZIF socket), use USB Blaster and program it from Quartus. What am I to do with the I/O pins during programming since they are not conn...
Nooraini_Y_Intel's avatar
Nooraini_Y_Intel
Icon for Frequent Contributor rankFrequent Contributor
7 years ago

Hi MJaco2,

The EPM240(MAX II) devices only support JTAG protocol for programming the device which is In-System Programming (ISP). You can only use the Quartus programmer with the USB Blaster cable to program the MAX II device via the JTAG pins only. By default, all MAX II I/O pins are tri-stated during in-system programming. The MAX II device provides a weak pull-up resistor during ISP.

Regards,

Nooraini