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LED interfacing to p89v51rd2

iPritam

Aug 28, 2010
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I am trying to interface an LED to p89v51rd2 micro... but couldn't find micros max current sinking capacity in datasheet.. could someone tell me what is this value?
 

davenn

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Sep 5, 2009
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I am trying to interface an LED to p89v51rd2 micro... but couldn't find micros max current sinking capacity in datasheet.. could someone tell me what is this value?

The Datasheet says 20mA absolute max for I/O Pins P1.5, P1.6, P1.7 and 15mA for all other I/O pins
so obviously you want to be below that so as not to kill the chip

Dave
 
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