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Altera_Forum
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10 years ago

Cyclone V SOC - SOCKit - all HSMC pins are high during FPGA config loading

I am trying to figure out why all the HSMC pins are high during boot from the SD Card up until the FPGA configuration is loaded? This takes several seconds. I'm trying to interface the SoCKi...
Altera_Forum's avatar
Altera_Forum
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10 years ago

The pre-configuration pullups on the SoC seem to be weak, and the outputs don't source much current. I haven't run into any problems, but check the data sheets to make sure.