Read metadata

nRF54L15 | nRF54L10 | nRF54L05 Datasheet

Each key slot has a 32-bit metadata field that can be read.

The metadata field is the same 32-bit field that is provisioned, see Provisioning.

When reading the metadata, KMU copies the key slot metadata from SICR to the METADATA register.

Key slot metadata can be read when the key slot is in the PROVISIONED state.

Perform the following steps to read key slot metadata.
  1. Configure the key slot ID in the KEYSLOT register.
  2. Trigger the READMETADATA task.

    If the key slot is revoked, KMU generates the REVOKED event and ends the operation.

    If the key slot has not been provisioned, KMU generates the ERROR event and ends the operation.

KMU copies data from SICR into the METADATA register. If copying of data was successful, KMU generates the METADATAREAD event. If unsuccessful, KMU generates the ERROR event.