sbj
New Contributor
New ContributorGPIO default state before FPGA configuration (weak pull-up vs. pull-down)
Between power-on and FPGA configuration, the GPIO pins are in a tristate condition with a weak pull-up enabled. As a result, the device’s digital outputs are initially driven HIGH and only switch to ...
Hello,
The default pre-configuration weak pullup cannot be changed to a weak pulldown. This is because the hardware defaults are fixed and cannot be altered via software or fuse before configuration.
If a low state is required prior to configuration, it is recommended to use external pulldown resistors to override the internal weak pullup.
regards,
Farabi
