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08/26/02 15:46
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 		 #27950 - RE: AT89C4051 --> external databus
Glenn,

P1.0 & P1.1 are comparitor inputs as well as bit ports, consequently, they are not internally pulled up.

Your write routine appears to correctly implement for a '373/'573 latch. Your "read" appears to have an error in that ALE is Set lo and never set high.

regards,
p





List of 12 messages in thread
TopicAuthorDate
AT89C4051 --> external databus            01/01/70 00:00      
RE: AT89C4051 --> external databus            01/01/70 00:00      
RE: AT89C4051 --> external databus            01/01/70 00:00      
RE: AT89C4051 --> external databus            01/01/70 00:00      
RE: AT89C4051 --> external databus            01/01/70 00:00      
RE: AT89C4051 --> external databus            01/01/70 00:00      
RE: AT89C4051 --> external databus            01/01/70 00:00      
RE: AT89C4051 --> external databus            01/01/70 00:00      
RE: AT89C4051 --> external databus            01/01/70 00:00      
RE: AT89C4051 --> external databus            01/01/70 00:00      
Peter can you check my code plz            01/01/70 00:00      
RE: Peter can you check my code plz            01/01/70 00:00      

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