SPRUJ55D September 2023 – July 2025 AM263P2 , AM263P2-Q1 , AM263P4 , AM263P4-Q1
This is the default mode on start-up. In this mode, several key bus signals such as the bus valid control signals from the checker CPU that would have indicated a valid bus transaction onto the interconnect are compared against their clamped safe values. While the two CPUs are in lockstep configuration, the outputs of the checker CPU are supposed to clamp to the inactive state that is all zeros. A difference between the checker CPU compare bus outputs and their respective inactive states is indicated by signaling an error to the ESM which sets the error flag "CCM-R5F - CPU1 AXIM Bus Monitor Failure".
| Signals | Remark |
|---|---|
| AWVALIDM | When asserted, indicates address and control are valid on the Checker CPU's AXI controller port for write transaction. |
| ARVALIDM | When asserted, indicates address and control are valid on the Checker CPU's AXI controller port for read transaction. |
| AWVALIDP | When asserted, indicates address and control are valid on the Checker CPU's AXI peripheral port for write transaction. |
| ARVALIDP | When asserted, indicates address and control are valid on the Checker CPU's AXI peripheral port for read transaction. |
| BVALIDS | When asserted, indicates that a valid write response is available on the Checker CPU's AXI peripheral port for write transaction |
| RVALIDS | When asserted, indicates address and control are valid on the Checker CPU's AXI peripheral port for read transaction |