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10/19/00 20:48
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#5852 - RE: Threshold of the ports:
A follow-up: A design relying on the treshold of an uC input pin will always be risky.
1) it varies from batch to batch
2) it varies from manufacturer to mfgr
3) it even may vary between r1a+ and r2a+

Use one of the inverters with schmitt trigger inputs feeding the uC pin, they are more tightly specified and the schmitt-trigger hysteresis gives much better noise immunity.

List of 12 messages in thread
TopicAuthorDate
Threshold of the ports:            01/01/70 00:00      
RE: Threshold of the ports:            01/01/70 00:00      
RE: Threshold of the ports:            01/01/70 00:00      
RE: Threshold of the ports:            01/01/70 00:00      
RE: Threshold of the ports:            01/01/70 00:00      
RE: Threshold of the ports:            01/01/70 00:00      
RE: Threshold of the ports:            01/01/70 00:00      
RE: Threshold of the ports:            01/01/70 00:00      
RE: Threshold of the ports:            01/01/70 00:00      
RE: Threshold of the ports:            01/01/70 00:00      
RE: Threshold of the ports:            01/01/70 00:00      
RE: Threshold of the ports:            01/01/70 00:00      

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