thanks all of you …. what | Microcontroller › 8051 › pull up resistor › thanks all of you …. what October 23, 2011 at 6:19 am #6744 dharmikParticipant thanks all of you …. what is the internal structure of resistor array how to connect it to port0 if we want ??? and which array is most suitable for atmel 89c51 4.7k or 10k…….?