Article Details

ID: 5044
Case Type: faq
Category: Architecture
Related To: IO
Family: iCE40

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What is the default configuration of the iCE40 pins?

The default state of the iCE40 I/Os is tri-state with a weak pull-up prior to configuration. During configuration, this same state is maintained. The device takes the software user-configured settings only after POR signal is deactivated and the device performs a proper download/configuration. Please refer to the data sheet section "Typical I/O Behavior During Power-up". Like the other PIOs, the SPI configuration l/Os and the RGB/IR LED (open drain pins) I/Os also exhibit same behavior.
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