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???
01/24/02 13:52
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 		 #19060 - RE: port 0 and external memory use
"I've read in the 8051 tutorial that when using external flash/ram I cannot use port0 or port2 as output ports - is this true?"
Only if you use memory mapped I/O. The things you say about and gates seems to indicate that is what you have.

Re ALE: you evidently need some basic understanding of the '51. Read the 80C51_FAM.. documents. They are at http://www.semiconductors.philips.com/products/...other.html

Erik


List of 13 messages in thread
TopicAuthorDate
port 0 and external memory use            01/01/70 00:00      
RE: port 0 and external memory use            01/01/70 00:00      
RE: port 0 and external memory use            01/01/70 00:00      
RE: port 0 and external memory use            01/01/70 00:00      
RE: port 0 and external memory use            01/01/70 00:00      
RE: port 0 and external memory use            01/01/70 00:00      
RE: port 0 and external memory use            01/01/70 00:00      
RE: port 0 and external memory use            01/01/70 00:00      
RE: port 0 and external memory use            01/01/70 00:00      
RE: port 0 and external memory use            01/01/70 00:00      
RE: port 0 and external memory use            01/01/70 00:00      
RE: port 0 and external memory use            01/01/70 00:00      
RE: port 0 and external memory use            01/01/70 00:00      

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