4.2 PCL - ADI INTERCONNECT SIGNALS

The ADI signals are connected to the matching signals on the two ADI chips with the following exceptions:

ICP is carry/parity in, and therefore is only connected to OCP of the high ADI.

IGAC is the Geographic Address check input, and therefore is only connected to BGPC of the low ADI.

ILAC is the Logical Address check input and must be connected to both OLAC outputs of the ADI. Because these are open-collector outputs a pull-up resistor (2.2k) to V is needed.

INCN is the Class N Address check input and therefore is only connected to ONCN of the low ADI.

OTB is the direction control signal for the ADIs and the translator/transceivers passing segment AD, PE, PA and TP signals.

OTD indicates that an external user read is taking place, therefore data is expected to be input to the ADI BD pins. OTD is connected to ITD on both ADIs