Initial value of ESMSR register [ TMS570LS122x ]

Hello FSSer,

The state of the ESMSRx is going to be dependent on what has happened prior to the reset and what type of reset your are referring to. In CCS, there is a CPU reset and there is a System Reset. If you perform a CPU reset, this is a soft reset and the content of ESMSRx will be retained from prior execution on the device. i.e., if you had loaded code on the device previously and forgot to program ECC or somehow generated an ESM error resulting in an exception, the ESMSR flags would remain set if you do not perform a System reset with the debugger even if you stop the debug session and reprogram the device. This is so that if there is an error in the real application, an nRST (warm boot or soft reset) can be performed and the error information retained for determination of how to proceed once the system is back up and running. Some error types can be critical such as continuous double bit ECC errors indicating a hard fault for permanent fault in memory.

If there is a fresh power up or a hard reset (nPORRST), the ESMSRx registers should come up all 0's as stated in the TRM.