SPRUJ79 November 2024 F29H850TU , F29H859TU-Q1
HSM Subsystem has two initiators, M4 core and HSM-RTDMA. HSM Sync bridge connects the C29 peripherals and memories to HSM subsystem.
Figure 3-21 consists of MPU (Memory Protection Unit), Data line buffer and Safe interconnect.
MPU configuration can only be done by CPU1 Link0/1/2 using the SYNCBRIDGEMPU Registers.
Read access going into C29 system memories must be 64 bit reads with reads buffered in dataline buffer improving throughput as compared to two 32-bit reads. Although read access to C29 system peripherals are 32-bit reads and is not buffered into dataline buffer.
Write access from other initiators are tracked and dataline buffer is invalidated if the address of the write matches address tag of line buffer similar to C29CPU dataline buffer.
ECC Checks are also performed in the sync bridge as part of the safe interconnect and errors are sent to HSM-ESM (Error Signaling Module).