Forum Discussion

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

FPGA drive current effect on power draw in Cyclone IV

Howdy, With the Cyclone IV FPGA, we have run into some issues with noise on Vccio and Vccint pins while using the 24 mA default drive current. I found an application note (http://www.altera.co...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

Facing errors with higher drive strength is actually a kind of alarm sign. If you have a large number of synchronous switching outputs, some ground bounce can't be avoided. But you should check, if the ground wiring and supply bypassing is sufficient in your PCB.