The data stored in the information memory of MSP430FR5948 was rewritten.
The phenomenon occurred on customer board with MSP430FR5948.
I saw Errata, but there were no such items as applicable.
I investigated variously, but I don't know the cause.
Is there countermeasure against this phenomenon?
What are the possible causes of this?
<Phenomenon contents>
The customer board saves the received data to the information memory by serial communication with the PC.
However, when restarting the MSP430FR5948 several times (turning on and off the power), the saved data was rewritten to another value.
Saved data had no problem before communication and reboot.
So, my customer think that the data has been rewritten after the MSP430FR5948 is started up.
<Survey result>
- Number of units generated : 1unit out of 3units
- Chip revision : F
- Information Memory area: 0x1800 to 0x1807
- Swap test :
- Good chip board x phenomenon occurrence chip : no phenomenon occurs
- Phenomenon occurred board x non-defective chip : no phenomenon occurrs
- Both tried turning the power supply on and off for about 100 times.
Best regards.
Crujiff