SPRUJ17H March 2022 – October 2024 AM2631 , AM2631-Q1 , AM2632 , AM2632-Q1 , AM2634 , AM2634-Q1
Figure 7-6 shows the interconnect diagram of the CCM-R5F with the two Cortex-R5F CPUs and the two VIMs. The core bus outputs of the CPUs are compared in the CCM-R5F. To avoid common mode impacts, the signals of the CPUs to be compared are temporally diverse. The output signals of the primary CPU are delayed 2 cycles while the input signals of checker CPU are delayed 2 cycles. The two cycle delay strategy is also deployed between the two VIM modules. While in lockstep mode, the checker CPU's output signals to the system are clamped to inactive safe values. Key signals which would have indicated a valid bus transaction to the interconnect are monitored by the CCM-R5F. The same approach is used for the key power domains if inactive signals indicate that bus controllers inside these power domains are asserting valid bus transactions.