Hi, I am using a C8051F311 MCU (Silicon Laboratories) and have connected P2(0:4) to +3.3V (+Vcc) via a DIP switch. When I close all 4 switches, the MCU consumes so much power that my voltage regulator (a 78M33) goes into thermal protection and switches off for some microseconds which resets the MCU. P2 is configured as digital input. Why is so much power consumed? Where is my mistake??? Thank you for answers,
/hhanff