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10/30/02 10:37
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 		 #31677 - RE: T89C51RD2 PSEN Sourcing too much cur
The data sheet tells, ALE, PSEN are different and can source 7mA at high level.
So 30mA on shorting to GND seems o.k..

I think, there is an overcurrent detection circuit inside to enable the bootloader.

And the Philips P89C** are working similiar.


Peter


List of 20 messages in thread
TopicAuthorDate
T89C51RD2 PSEN Sourcing too much current            01/01/70 00:00      
RE: T89C51RD2 PSEN Sourcing too much cur            01/01/70 00:00      
RE: T89C51RD2 PSEN Sourcing too much current            01/01/70 00:00      
RE: T89C51RD2 PSEN Sourcing too much current            01/01/70 00:00      
RE: T89C51RD2 PSEN Sourcing too much current            01/01/70 00:00      
RE: T89C51RD2 PSEN Sourcing too much current            01/01/70 00:00      
RE: T89C51RD2 PSEN Sourcing too much current            01/01/70 00:00      
RE: T89C51RD2 PSEN Sourcing too much current            01/01/70 00:00      
RE: T89C51RD2 PSEN Sourcing too much current            01/01/70 00:00      
RE: T89C51RD2 PSEN Sourcing .. J            01/01/70 00:00      
RE: T89C51RD2 PSEN Sourcing too much current            01/01/70 00:00      
RE: T89C51RD2 too much trouble            01/01/70 00:00      
RE: T89C51RD2 too much trouble            01/01/70 00:00      
RE: T89C51RD2 too much trouble            01/01/70 00:00      
RE: T89C51RD2 \\            01/01/70 00:00      
RE: T89C51RD2 Datasheet version?            01/01/70 00:00      
RE: T89C51RD2 Datasheet version?            01/01/70 00:00      
RE: T89C51RD2 PSEN Sourcing too much cur            01/01/70 00:00      
RE: T89C51RD2 Datasheet Version?            01/01/70 00:00      
RE: T89C51RD2 Datasheet Version?            01/01/70 00:00      

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