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DOZA
Visitor
Visitor
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Registered: ‎06-23-2020

All pins HIGH in SPARTAN 6

Hi! 

I program (ISP) the flash memory via Spartan 6 by USB Platform Cable II. But I have some peripheral devices that are directly connected to the FPGA. And when I program the flash memory by USB Platform Cable II the FPGA set pins N5 and P4 (IO_L49P_D3_2 and IO_L63N_2) in HIGH. Somebody know how remove this behavior when I in-system program that flash via FPGA?  

Thanks!

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DOZA
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Visitor
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Registered: ‎06-23-2020

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drjohnsmith
Teacher
Teacher
185 Views
Registered: ‎07-09-2009

You might be on to a looser here,
As far as I remember, the choice is to have IO pulled up internally or to have them float during configuration.

This is set by an external pin,

Floating the outputs with out a pull up / down resistor externally, you don't know which level your going to have, so it may work today ,and not tomorrow.

Sorry, Sounds like its a mod / re spin.


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DOZA
Visitor
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Registered: ‎06-23-2020

I think it's very useful remark. Do not forget to install weak pull-up/down resistors where it's necessary.

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