This application note shows some circuits that can used to optically isolate input, output and bi-directional digital pins. Debug interfaces for the Background Debug Mode of the 68HC(S)12
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Opto Isolation Circuits For In Circuit Debugging of 68HC9(S)12 and 68HC908 Microcontrollers
This application note shows some circuits that can used to optically isolate input, output and bi-directional digital pins. Debug interfaces for the Background Debug Mode of the 68HC(S)12