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???
07/23/10 00:11
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 		 #177418 - RE: delay from plug-in before you can get 500mA?
Responding to: ???'s previous message
Erik Malund said:
... does this mean you have to delay from plug-in before you can get 500mA?

Yes.

Before you enumerate, you can only have 100mA; once suitably enumerated, you can have the 500mA.

The host might decline your request for 500mA.

Having said that, some hosts don't care and just let you have 500mA regardless - maybe somewhat more.

See: http://www.8052.com/forumchat/read/176731

List of 42 messages in thread
TopicAuthorDate
common DCtoDC converter suggestion            01/01/70 00:00      
   5 things            01/01/70 00:00      
   Figure 17            01/01/70 00:00      
   Problems2Problems            01/01/70 00:00      
   Pin 6 needs to be connected            01/01/70 00:00      
   I would take the LM2574...            01/01/70 00:00      
      great suggestion            01/01/70 00:00      
         Calculation            01/01/70 00:00      
            new schema            01/01/70 00:00      
               New Schema but Still No Go            01/01/70 00:00      
                  New Schema            01/01/70 00:00      
                     from datasheet and AP+calculator            01/01/70 00:00      
                     Still a No Go            01/01/70 00:00      
                        Change            01/01/70 00:00      
                           In the context of this reguator part...            01/01/70 00:00      
                              Power from USB            01/01/70 00:00      
                              General context of switcher chips?            01/01/70 00:00      
                              Hold on            01/01/70 00:00      
                                 USB 500mA            01/01/70 00:00      
                                    never having sucked power from the USB plug            01/01/70 00:00      
                                       RE: delay from plug-in before you can get 500mA?            01/01/70 00:00      
                                          What's Legal...            01/01/70 00:00      
                           Always too short initial posts            01/01/70 00:00      
                              You may have 500mA (2.5W)            01/01/70 00:00      
                                 Yup..            01/01/70 00:00      
                                    12 more than 33 VDC            01/01/70 00:00      
                                       Don't use 7812            01/01/70 00:00      
                                          Used 2 pieces IC            01/01/70 00:00      
                                             Always problem with available power            01/01/70 00:00      
                                                with automatic fuse            01/01/70 00:00      
               Application Note            01/01/70 00:00      
               MC34063A Calculator            01/01/70 00:00      
                  OK            01/01/70 00:00      
            Help calculating divider resistors            01/01/70 00:00      
               E-series            01/01/70 00:00      
         I misunderstood you...            01/01/70 00:00      
            Refer application note AN920/D            01/01/70 00:00      
               App Note Caution            01/01/70 00:00      
                  Yes, but sometimes...            01/01/70 00:00      
                  I suppose so,            01/01/70 00:00      
                     ????            01/01/70 00:00      
            price            01/01/70 00:00      

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