SPRUI30H November 2015 – May 2024 DRA745 , DRA746 , DRA750 , DRA756
The general operating mode of the SCTM STM function is to periodically export a message frame that provides a snapshot of the state of each counter designated for inclusion in the STM counter state message. The length of the snapshot interval is controlled by a programmable counter. The interval for this counter is determined by the value in the SCTM_CTSTMINTVL_i register. A periodic counter is reloaded with this value. The counter decrements using the functional clock of the SCTM. When the counter decrements to 0, a snapshot of all the designated counters is taken for STM export and the counter is reloaded using the value in CTSTMINTVL. If the value in CTSTMINTVL is 0, periodic message export is disabled.
Because an entire snapshot of data must be captured when an interval expires, the SCTM must have temporary storage for all the counter values that are designated for export.