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Each of the bidirection arrows above represent a 48-bit bus. The external
connectors are labeled with the connector name and the bus number. For
example "conn09_bus3" means external connector 09 bus #3. The bus can be
configured to use either LVTTL or LVDS signal standards. When using LVDS
signals, the even bits are the positive signal of the pair, and odd bits are
the negative signal. Bit numbering starts with zero. |