A dead loop Bug | Cypress Semiconductor
A dead loop Bug
I made three PCB board for my custom design which use CY8C4247 as main CPU. But I entered into a dead loop error on a board, and the other two boards didn't have this problem. The three boards had the same firmware. With the oscilloscope, I found the "dead" board's power supply vary from 2.45 to 3.2v which my typical power supply is 2.8v, and the "good" boards' power supply vary from 2.78 to 3.01v. Is the power supply the reason of "dead loop"? How can I debug this problem?