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Kai Klaas
02/23/06 06:22
  02/23/06 06:24

Read: 529 times

#110582 - IOL
Responding to: Suresh R's previous message
Doubt: Does that mean that p1.x could sink 10 mA when kept low.
So, i would like to know what does this IOL = 10mA signify.

The term "IOL" has a very certain meaning in datasheets. It means, that if the output is low, concretely spoken if the NMOS-FET of output stage is turned-on and the PMOS-FET is turned-off, that then a current of up to 10mA is allowed to flow into the output pin, through the NMOS-FET and finally to ground.

This has nothing to do with the current "IIL", that flows, when the port is configuered as input, by writing 1s into the according SFR, and the port then is forced to logic low state by external circuitry.


List of 19 messages in thread
AT89s52 Port pin clarifications:      Suresh R      02/16/06 02:14      
   nice copy, where is the question      Erik Malund      02/16/06 06:30      
   output characteristics      Jan Waclawek      02/16/06 06:53      
      most confusing post      Jez Smith      02/16/06 07:34      
   Answers      Kai Klaas      02/16/06 10:35      
      Logic 1 to 0 transition      Suresh R      02/17/06 05:01      
         You haven't read the 'bible' chapter...      Kai Klaas      02/17/06 08:38      
            no details about transition from logic 1      Suresh R      02/18/06 03:27      
               other way 'round      Jan Waclawek      02/18/06 04:21      
               There ARE!!      Kai Klaas      02/18/06 06:54      
                  pFET2      Suresh R      02/19/06 07:29      
                     Weak and very weak pull-ups      Kai Klaas      02/20/06 07:19      
      maintaining low source impedence?      Suresh R      02/20/06 03:39      
         by making thje driver a sink............      Abhishek Singh      02/21/06 10:02      
         Pull-downs create problems      Kai Klaas      02/22/06 08:00      
            Maximum IOL per port pin: 10 mA ?      Suresh R      02/23/06 04:43      
               IOL      Kai Klaas      02/23/06 06:22      
                  IOL = 10mA or 1.6mA? in port 1      Suresh R      02/23/06 22:26      
                     Depends on load      Kai Klaas      02/25/06 07:40      

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