SPRS841E March 2012 – October 2019 TMS320C6652 , TMS320C6654
Refer to the PDF data sheet for device specific package drawings
The Bootcfg module contains a kicker mechanism to prevent any spurious writes from changing any of the Bootcfg MMR 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). On the C6654 and C6652, the exceptions to this are the IPC registers such as IPCGRx and IPCARx. These registers are not protected by the kicker mechanism. This mechanism requires two MMR writes to the KICK0 and KICK1 registers with exact data values before the kicker lock mechanism is unlocked. See Table 8-2 for the address location. Once released, then all the Bootcfg MMRs having write permissions are writable (the read only MMRs are still read only). The first KICK0 data is 0x83e70b13. The second KICK1 data is 0x95a4f1e0. Writing any other data value to either of these kick MMRs will lock the kicker mechanism and block any writes to Bootcfg MMRs. To ensure protection of all Bootcfg MMRs, software must always relock the kicker mechanism after completing the MMR writes.