Does STM8S001J3 reset protection via STVP? As well as in other series STM8?I did not get through STVP. So far, only through IAR - when connecting, select Option Bytes. IAR warns about clearing all memory, agree and everything is ok.

Started working with LIS302DL. Then took the LIS3DSH. The program is the same. After starting LIS3DSH, it gives correct readings along the axes, but after a few seconds of work, the data becomes permanent. The time to failure varies from a few second...

There is a st-link. Tried to connect STVP, IAR STM8. Nothing happens. STM8S001J3 is not connected. Power commuted when trying to connect. With constant power, I also tried to connect. Why did you make such a bad microcontroller ?!