Does it appear the board survived the slight over voltage or is it too early to tell?
I don't believe I have a 6.8k or 24k in those sizes.
Jim WA4CWI
While reviewing things today I realized i had the Watchdog timer enabled for protection until things are working. However we have a watchdog that turns on at power up and stayed active for about 1.2 seconds. After 1.2 seconds it turns the general power to the board off. I am doing my testing by slowly increasing the power supply current which means the voltage comes up slowly.
The 1.8 volt supply has never been turned on so far.
When Power and clocks are stable we will disable the watchdog until code is running in CPU at power up.
Something to think about later, A watchdog normally resets a processor. In this case i have one watchdog turning off the distributed power to the board. We may need a power cycle to restart the watchdog process. If we are a host on a larger platform we do have a method to cycle power. If we do not want to rely on intervention we may need to change things in this design.
I needed a 6.8K resistor and a 24K resistor to recondition the 3.3 volt regulator. I purchased 100 6.8K resistors a year ago but can’t find them. Kent WA5VJB will bring me the resistors to the NTMS meeting tomorrow so I can keep moving forward.
Bob
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