my mc is 89v51RD2.PORT2 | Microcontroller › 8051 › problem with 16X2 LCD › my mc is 89v51RD2.PORT2 September 12, 2012 at 1:56 am #8570 chandrasekharParticipant my mc is 89v51RD2.PORT2 (21-28) IS BIDIRECTIONAL I/O PORT WITH INTERNAL PULLUP’S. MY PULL UP RESISTOR SPECIFICATION IS A103J.
