"1-Wire" communication using cc1110 and PIC16LF1823

Discussion in 'Homework Help' started by morfeus, Nov 18, 2012.

  1. morfeus

    Thread Starter New Member

    Nov 18, 2012

    I would like to create 1-wire network using cc1110 (from Texas Instruments) as master and PIC16LF1823 as slaves. For now, I was successfully able to communicate over CAT5 cable of length 4.8m only using pull-up resistor on the line and one slave. However, I would like to make the line a little bit longer so I am designing slew rate control. I found http://www.maximintegrated.com/app-notes/index.mvp/id/148 and I think that the design on the master side should be something like that. However, as I am driving the network with 3.6V, shall the MOSFET, capacitor 220pF and 3.3k resistor be changed? How can I exactly calculate the R and C for the slew rate of 0.8V/usec? As the CC1110 can sink only 4mA, the pull-up resistor should be 100Ohm or can it be lowered?

    Thanks and kind regards,