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Altera_Forum
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12 years ago

stratix iii FPGA-The AS prom configuration is not happening

i have a custom board with stratix iii FPGA. The AS prom configuration is not happening. After debug, it was found that nSTATUS pin impedance w.r.t Gnd is around 3 ohm. Config through JTAG is ok and ...
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Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

What voltage do you see on nSTATUS once the FPGA is configured? Can I assume you have a pull-up resistor fitted to the pin?

3 ohms doesn't sound good. However, if you measured that with the board on but without the FPGA configured, that could make sense.

Referring to: configuring stratix iii devices (http://www.altera.com/literature/hb/stx3/stx3_siii51011.pdf), figure 11-8 on page 11-18. Can you confirm this is how you've connected your FLASH device? Are your MSEL pins connected correctly?

Regards,

Alex