27 GPIO

PORT AHB Access

Following a power cycle, the GPIO direction register may be inadvertently cleared, causing the GPIO pins configured as outputs to operate incorrectly.

Workaround

During GPIO initialization, perform one valid, side-effect-free (AHB) access to a documented GPIO register before the first PORT_IN read.

Affected Silicon Revisions


A1	A2
X	X

Rev: I

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