SPRUJ17H March 2022 – October 2024 AM2631 , AM2631-Q1 , AM2632 , AM2632-Q1 , AM2634 , AM2634-Q1
In error forcing mode, a test pattern of all 1's is applied to the check CPU's compare logic to force an error in the compare error output signal of the compare unit. The ESM error flag “CCM-R5F - CPU1 AXIM Bus Inactivity failure” is expected after the error forcing mode completes. As a side effect, the “CCM-R5F self-test error” flag is also asserted whenever the CPU compare error is asserted.
The error forcing mode takes one cycle to complete. Hence, the failing signature is presented for one clock cycle. After that, the mode is automatically switched to active compare mode. The key register (MKEY3) will indicate the active compare mode once it is switched to active compare mode. During the one cycle required by the error forcing test, the checker CPU Inactivity Monitor is deactivated. User should expect the ESM to trigger a response (report the CCM-R5F fail). If no error is detected by ESM, then a hardware fault is present.