I made an Trackball using Cy7c63813 Chip.
But, It has an problem.
After a lot of times on/off, it doesn't work.
It looks like user area in flash memory is erased.
There is no silicon errata for CY7C63813.
- Are you operating CPU @ 24MHz, and VDD falls below 4.75V?
- Have you removed the HALT instruction inside the LVD interrupt handler?