Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

EP2C8 start-up problem

Hello I have a board with an EP2C8 that displays a strange problem when loaded with a certain application. When I apply power to the device, nothing happens - but the minute I connect my...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

replace resistor r1 10k with a 0 ohm resistor.

you have nCE connected to GND via this 10K resistor, and when you plug in the blaster, this nCE pin will be tied to GND and enabling the configuration.

when no blaster is conected, this input pin is connected via this high value resistor to GND and that should be the reason for your problem.

have a look here

http://www.altera.com/literature/hb/cyc2/cyc2_cii51013.pdf (http://www.altera.com/literature/hb/cyc2/cyc2_cii51013.pdf)

On page 8 nCE is connected directly to GND

On page 55 you will see those information for combining JTAG and AS mode