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10/30/02 10:12
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 		 #31675 - T89C51RD2 PSEN Sourcing too much current
I'm using an Atmel T89C51RD2 and activating the ISP bootloader with PSEN low, EA high and ALE not connected at the falling edge of RESET. ISP is working fine but PSEN is sourcing just over 30mA when pulled low. Is this normal? The datasheet states that PSEN has the same structure as P1 - P3 and so should source much less than 30mA when pulled low.

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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