#
#                   CB_Fan  PCB  Nets
#
#          General Purpose Input  4 Signals  Nets
#         ----------------------------------------
#
#
#                                                 Original Rev.  9-Mar-2012
#                                              Most Recent Rev. 14-Apr-2012
#
#
#
#  This file holds the netss that make the
#  4 General Purpose Input Signals.
#
#  Start the section that has the nets that allow
#  the CB-Fan to receive 4 general purpose input lines,
#  as either LVDS, Diff_ECL, or single ended 3.3V logic,
#  and return these signals to the Control H-Clk card
#  on the same lines that are used for Scaler System
#  Almost_Full_1_2 and LNE_Event.
#
#  Conn  J13  is used to receive these 4 General Purpose
#  input lines as single ended 3.3V logic.
#
#  Conn  J12  is used to receive these 4 general Purpose
#  input lines as  LVDS  or  Diff_ECL.
#
#  Conn  J7  is for the cable that returns 4 signals,
#  either Scaler System Almost_Full_1_2 and LNE_Enable
#  or  these 4 general purpose input signals   to the
#  Control H-Clk card.


#  Start by Grounding the even number pins on J13.

NET  'GROUND'   J13-2    J13-4    J13-6    J13-8    J13-10


#  Connect the odd number pins on  J13,  i.e. the single
#  ended 3.3V logic signals,  to the input of the LVDS Driver.

NET  'GP_IN_1_TO_DRIVER_IN'   J13-1   U56-7    # General Purpose 3.3V In 1
NET  'GP_IN_2_TO_DRIVER_IN'   J13-3   U56-6    # General Purpose 3.3V In 2
NET  'GP_IN_3_TO_DRIVER_IN'   J13-5   U56-3    # General Purpose 3.3V In 3
NET  'GP_IN_4_TO_DRIVER_IN'   J13-7   U56-2    # General Purpose 3.3V In 4


#  We also have pull-down resistors on these 4 General Purpose
#  Input signals which are needed on these CMOS inputs when
#  no real signal is connected to them.

NET  'GP_IN_1_TO_DRIVER_IN'   R171-2   # General Purpose Input #1 Pull-Down
NET  'GP_IN_2_TO_DRIVER_IN'   R172-2   # General Purpose Input #2 Pull-Down
NET  'GP_IN_3_TO_DRIVER_IN'   R173-2   # General Purpose Input #3 Pull-Down
NET  'GP_IN_4_TO_DRIVER_IN'   R174-2   # General Purpose Input #4 Pull-Down

NET  'GROUND'   R171-1   R172-1   R173-1   R174-1   # Ground the Pull-Downs



#  Connect the outputs from the 4 General Purpose Signal
#  LVDS Drivers  to the pins are the J7 connector that run
#  these 4 General Purpose Input signals back to the Control
#  H-Clk card.   At the same time pick up the pins on J12
#  that allow you to receive the 4 General Purpose Input
#  signals at ECL or LVDS levels.   Recall the the first
#  two pin pairs on J7  (going back to the Control H-Clk card)
#  may also be used to carry the Almost_Full_1_2 from the
#  Scaler System Control Bus.

NET  'FULL_1_SCLR_OR_GPIN_1_DIR'   U56-10   J12-1    # GP Signal #1 DIR  back to the
NET  'FULL_1_SCLR_OR_GPIN_1_CMP'   U56-9    J12-2    # GP Signal #1 CMP    Control H-Clk

NET  'FULL_2_SCLR_OR_GPIN_2_DIR'   U56-12   J12-3    # GP Signal #2 DIR  back to the
NET  'FULL_2_SCLR_OR_GPIN_2_CMP'   U56-11   J12-4    # GP Signal #2 CMP    Control H-Clk

NET  'GPIN_3_DIR'   U56-14   J12-5   J7-5    # GP Signal #3 DIR  back to Control H-Clk
NET  'GPIN_3_CMP'   U56-13   J12-6   J7-6    # GP Signal #3 CMP

NET  'GPIN_4_DIR'   U56-16   J12-7   J7-7    # GP Signal #4 DIR  back to Control H-Clk
NET  'GPIN_4_CMP'   U56-15   J12-8   J7-8    # GP Signal #4 CMP


#  Jumpers to enable the outputs of the 65LVDS391
#  LVDS driver chip  for the 4 General Purpose Input Signals.
#  Either or both pairs of LVDS outputs from the 65LVDS391
#  may be separately enabled.

NET  'GPIN_4_DRV_12_ENB'   U56-1   R138-1   R139-2   # ENAB 65LVDS391 sections 1,2

NET  'GPIN_4_DRV_34_ENB'   U56-8   R136-1   R137-2   # ENAB 65LVDS391 sections 3,4

NET  'VDD'                         R137-1   R139-1   # Pull-Up for EN
NET  'GROUND'                      R136-2   R138-2   # Pull-Down for EN