IO_INTERFACE: TACH* signals from fans
Why are there is a resistor divider made of 3 resistors on each of these lines? I think tacho outputs from fans are usually OC, so it's enough to pull them up to a required voltage tolerated by IC57.
Why are there is a resistor divider made of 3 resistors on each of these lines? I think tacho outputs from fans are usually OC, so it's enough to pull them up to a required voltage tolerated by IC57.