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

Back to Subject List

Old thread has been locked -- no new posts accepted in this thread
Erik Malund
01/09/12 07:47
Read: 384 times
Mt Airy, Nc
USA


 
#185389 - because the designer
Responding to: ???'s previous message
1)Why is P0 an open drain? Is it related to being able to use that port for addresses?
because the designer of the chip decided so

2)Why the value of 10k ohms resistor array used as pull-up on P0?
because the value matches the application the circuit was made for

the above answers may seem fastidious, but they are perfectly vaili

Also any source of explaining the source/sink ?(tried googling but none of the results I understood well)
http://www.8052.com/faqs/121619

Erik

List of 3 messages in thread
TopicAuthorDate
AT89S52 Questions      Adam Collins      01/09/12 07:25      
   because the designer      Erik Malund      01/09/12 07:47      
   Sink & Source - Basic Electronics      Andy Neil      01/09/12 11:17      

Back to Subject List