ZHCSBT2G November 2012 – October 2017 66AK2H06 , 66AK2H12 , 66AK2H14
PRODUCTION DATA.
The Bootcfg module contains a kicker mechanism to prevent spurious writes from changing any of the Bootcfg MMR (memory mapped registers) values. When the kicker is locked (which it is initially after power on reset), none of the Bootcfg MMRs are writable (they are only readable). This mechanism requires an MMR write to each of the KICK0 and KICK1 registers with exact data values before the kicker lock mechanism is unlocked. See Table 10-30 for the address location. Once released, all the Bootcfg MMRs having write permissions are writable (the read only MMRs are still read only). The KICK0 data is 0x83e70b13. The KICK1 data is 0x95a4f1e0. Writing any other data value to either of these kick MMRs locks the kicker mechanism and blocks writes to Bootcfg MMRs. To ensure protection to all Bootcfg MMRs, software must always relock the kicker mechanism after completing the MMR writes.