Sep 30, 2021
05:15 AM
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Sep 30, 2021
05:15 AM
In general, it is recommended to connect unused WKx pins to GND.
However, it is possible to leave the unused WKx pins floating, as long as the internal pull-down resistors are enabled by SPI command.
If a WKx pins are unused and routed to the connector, it is recommended to keep the corresponding ESD capacitors populated on the board.
Important note:
If a WKx function is disabled and the device goes to Fail-Safe Mode, the WKx is automatically enabled as one of the wake-up sources. If an unused WKx input is left open without activated pull-down, this input can trigger a wake event, sending the device back to normal mode.
However, it is possible to leave the unused WKx pins floating, as long as the internal pull-down resistors are enabled by SPI command.
If a WKx pins are unused and routed to the connector, it is recommended to keep the corresponding ESD capacitors populated on the board.
Important note:
If a WKx function is disabled and the device goes to Fail-Safe Mode, the WKx is automatically enabled as one of the wake-up sources. If an unused WKx input is left open without activated pull-down, this input can trigger a wake event, sending the device back to normal mode.
- Tags:
- IFX
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