The 8051 microprocessor has ________ parallel I/O ports. Q & A › The 8051 microprocessor has ________ parallel I/O ports. 0 Vote Up Vote Down Admin Staff asked 4 years ago The 8051 microprocessor has ________ parallel I/O ports. a)2 b)3 c)4 d)5 Share this:TwitterFacebookWhatsAppPinterestLike this:Like Loading... 1 Answers 0 Vote Up Vote Down Admin Staff answered 4 years ago c)4 Share this:TwitterFacebookWhatsAppPinterestLike this:Like Loading...