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Altera_Forum's avatar
Altera_Forum
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17 years ago

PCI Clamp Diode

Hi, Does anyone know how to disable the PCI clamp diode for individual Inputs on a Flex10KE within Quartus ?. I have the I/O configured for LVTTL but the inputs are being clamped by the clamp ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

The FLEX 10KE manual tells different:

--- Quote Start ---

The PCI pull-up clamping diode, slew-rate control, and open-drain output options

are controlled pin-by-pin via Altera software logic options.

--- Quote End ---

The actual configuration can be reviewed in the fitter resource section anyway, PCI clamp diodes should be controllable via Pin Planner or Assignment Editor as for any FPGA family.