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Hello people, I am using LPC2138 for very long now. I faced an issue with it.
WDTR: This bit is set when the Watchdog Timer times out and the WDTRESET bit in the Watchdog Mode Register is 1. It is cleared by any of the other sources of Reset.
This is what is mentioned in the user manual UM10120, Page: 44 of 297.
However this bit is set due to rise in temperature as well. I am not very sure but I face this problem only in summers.
Anyone got any idea ?
Yes this happens only in summers. I am monitoring WDT very keenly. If the WDT is reset, I get a message on the LCD "WDT reset". This should happen only when it really gets reset. But whenever there is no change in the timer value but still it gets reset in summers is something which is not understandable.
Standard procedure in the certification of any microcontroller based product I encountered is testing in a climate chamber!
Sounds like you should be speaking to NXP about this...
Yes I guess this is an new problem which should be included in the errata sheet.
www.catb.org/.../smart-questions.html
(applies equally to hardware bugs)
Precisely because you still guess, it shouldn't. Your claim of a hardware bug is not supported by anything like conclusive evidence.