5. On Start-up the Microcontroller Goes Into Test Mode
Under specific conditions (power lead edge, temperature and P3 value) on start-up T8xC5101/02 devices do not exe-
cute the user code. It goes into test mode and stays there.
Workaround
1. P3 = 0x00
2. Send another reset pulse a few machine cycles after the falling edge of the first reset pulse.
2 T8xC5101/02 Errata Sheet
4162B–8051–06/02