[BOOT-9537] Accidentally Enter USB Download Boot Mode If the Power-up Duration Is Too Long

Affected revisions: v0.0 v0.1

Description

During power-on, if the voltage rises from 0 V to 3.3 V in more than 12 ms, the chip may accidentally enter USB Download Boot mode.

Workarounds

Ensure that the power-up duration is less than 12 ms.

Solution

Fixed in chip revision v1.2.