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Question by Melky
Submitted on 6/9/2004
Related FAQ: 8051 microcontroller FAQ
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I want to interface the 32k NVRAM and an 4*20 LCD and 6 relays ,and 6 switches with 89c51rd2 philips microcontroller.I coudln'tget enough port pins for connecting all this pheripherals.What can I do?.Can I use parellel slave port? how?



Answer by Vijay
Submitted on 6/24/2004
Rating: Not yet rated Rate this answer: Vote
You can use decoder to increase port pins

 

Answer by rex
Submitted on 2/6/2006
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using decoder is not a good option.

 

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