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sm110's avatar
sm110
Icon for New Contributor rankNew Contributor
2 years ago

CycloneXLP device

It is observed that all the outputs of cyclone X Lp device goes to high state till the configuration is completed. This will be a problem when the output is driving a device which require low on powe...
Fpga Devkit
Ash_R_Altera's avatar
Ash_R_Altera
Icon for Regular Contributor rankRegular Contributor
2 years ago

Hi,

Please refer to the following page 6.3.2. Configuration Sequence (intel.com). As per it, all the I/O pins are tied to an internal weak pull-up at power up, before configuration.

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Solution to your requirement will be to connect on-board pull-down resistors for the output pins which are required to be low.

For the input pins, it does not matter, because the FPGA is not configured yet.


Hope that helps.


Regards