SPRUJ55D September 2023 – July 2025 AM263P2 , AM263P2-Q1 , AM263P4 , AM263P4-Q1
The registers corresponding to the PLLs are present in TOP_RCM. Before accessing any register in MSS_RCM and TOP_RCM memory map, unlock the corresponding LOCK_KICK config registers with the following values:
The above unlock procedure should be repeated for CONTROLSS_CTRL before configuring any MMRs in that region.
After these two steps a write access to the PLL registers is allowed. Writing any other data value to either of these two registers locks the kicker mechanism and blocks any writes to the PLL registers.
Refer to the Control MMR chapter for more details on locking.
In order to ensure that all PLL registers are write protected, software must always re-lock the kicker mechanism after completing the register writes.