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Altera_Forum
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8 years ago

MAX 10 FPGA power-on/configuration error

I have a custom board with a 10M25SAE144xxx part that I am trying to bring up, but the device seems to be failing configuration at power-on. This is a single-supply device, and power is applied thro...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
8 years ago

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I managed to resolve the issue by placing a weak pull-up (10K) resistor (to 3.3V) on the CONF_DONE pin.

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On Altera devices conf_done and nstatus are bidirectional, open-drain pins. They can ONLY drive low. A pullup (10K recommended) to VCCPGM (usually +3.3V) is required, not optional.