Forum Discussion

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

what's effect of EPM config controller?

hello , i know that the EPM is very useful when power up,it can put the .sof that stored in the flash into FPGA, but, when i config the EPM with an incompatible config_controller.pof,...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
21 years ago

Another potential gotcha:

The config controller configures the FPGA. It does this by actively wiggling signals to the dev board flash such that data is presented to the FPGA for configuration. If your new config controller design doesn't tri-state its IOs that go off to the tri-state bus... bad things (contention, bad data, frying IO buffers) can/will happen.