DefaultISR

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DefaultISR

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Contributor III

Hi.

I have been made a source code with NXP PCB and my company's new PCB was received last week.

S I downloaded a source code which was activated well on NXP PCB into new PCB but there was a problem.

■ Situation : during debuging, source code is stopped at 'DefaultISR'

클록변경시 디버깅 동안 계속 작동하는 코드 위치_DefaultISR_8M-40M.jpg

■ Difference between NXP PCB to my new PCB : XTAL

- NXP PCB : 8MHz

- my company's new PCB : 40MHz

※ refer to Device feature summary of datasheet(51page)

외부 클럭 적용 범위.jpg

■ review

1. System OSC Clock : change from 8MHz to 40MHz

 1) NXP PCB : after changing from 8MHz to 4MHz, I confirmed the source code was stopped at 'DefaultISR' during debugging.

 2) my company's new PCB : happened same situation. The source code was stopped at 'DefaultISR'

2. External Reference Select : change from 'External crystal oscillator' to 'External clock source'

 1) my company's new PCB : The source code was stopped at 'DefaultISR'


3.  System OSC Range Select : change from Medium to High

 1) my company's new PCB : The source code was stopped at 'DefaultISR'

■ Component Inspector : before chagne(activation is ok)

작동되는 SOSC 설정.jpg

■ Component Inspector : after(the source code is stopped at 'DefaultISR')

변경 SOSC.jpg

■ Question : What should I do if I use 40MHz?

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NXP Employee
NXP Employee

Hi, 

Probably related dividers/multipliers are set incorrectly. Check the warning messages. My configuration for 40MHz crystal oscillator is on pictures bellow.

s32ds_2017-03-14_09-22-16.png 

s32ds_2017-03-14_09-13-51.png

Jiri 

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