Article Details

ID: 5747
Case Type: faq
Category: Architecture
Related To: IO
Family: iCE40 Ultra

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When instantiating SB_IO primitive with PIN_TYPE = 110100, why does Place and Route seems to be changing it to PIN_TYPE = 10010, thus, in turn, disables the output enable register of the SB_IO primitive and causes timing delays?

Please add a Windows Environment Variable "DISABLE_IOGLITCHFIX_THUNDER" with a value of 1. This setting ensures that the Pin type is always 110100.
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