Email: Password: Remember Me | Create Account (Free)

Back to Subject List

Old thread has been locked -- no new posts accepted in this thread
???
07/23/01 02:54
Read: times


 		 #13395 - RE: 89c52 need pull up resistor at port 0 ?
Well, I agree wit Alfredo and Jacek, The port 0 doesn't need pull up resistor. As like as what my literature said : "...Data appears on the Port 0 lines when the external memory is enabled by PSEN* or RD*. PSEN* and RD* function as memory bank selectors which the 8052 activates according to the memory access instruction. ..." And, the instructions are MOVC and MOVX.

Well, if it's not, please tell me...

ERWIN Sutanto


List of 6 messages in thread
TopicAuthorDate
89c52 need pull up resistor at port 0 ?            01/01/70 00:00      
RE: 89c52 need pull up resistor at port 0 ?            01/01/70 00:00      
RE: 89c52 need pull up resistor at port 0 ?            01/01/70 00:00      
RE: 89c52 need pull up resistor at port 0 ?            01/01/70 00:00      
RE: 89c52 need pull up resistor at port 0 ?            01/01/70 00:00      
RE: 89c52 need pull up resistor at port 0 ?            01/01/70 00:00      

Back to Subject List