EDITED: HDK at ambient temperature.
Hello there,
I've a early version of the TMS570LS31x HDK with a TMX570LS3137BZWTQWQI YFB - 25ASX4W GI MCU that we have acquired a couple of years ago.
Recently, every time when it is powering up in the morning, the ESMSR3=0x00000008 indicating an ESM Group3 RAM even bank ECC error, and the nERROR pin was asserted (onboard red led ON), and the MCU refused to start.
Please note that it is possible to read the ESMSR3 value only when the debugger is connected via JTAG, then reprogrammed with the same binary code. It is now possible to operate correctly but the onboard red led remains ON.
After warming up the MCU for a while, if the power is turned OFF on the HDK, for a matter of seconds or minutes, then turned ON, everything is working fine and no more RAM ECC error.
Any explanation on this behavior?
Thanks.