/diy/ - Do It Yourself

>>1569018
the pullup puts a 1 on the bus. the idle Tx level of each slave is 1. when any slave Txes a 0, the bus gets pulled low through the diode. due to the diodes on this and other slaves, none of them can pull the bus high with a 1. they can only stop pulling the bus to 0 and leave the pullup to pull it back to 1
some multidrop protocols cast the 1 and 0 as recessive vs. dominant states, if that helps your understanding

>>1569026
>timing constraints
>project management