#
#                     Crystal Oscillators
#                   -----------------------
#
#
#                Disco-Kraken  Key In Net List
#               -------------------------------
#
#
#                                        Initial Rev.   6-Dec-2022
#                                        Current Rev.  12-Dec-2023
#
#
#   This net list holds the   Crystal Oscillators
#   and their connections to the DK FPGA/CPU.
#
#
#   The components for the   Crystal Oscillators
#   are in the range  1501 to 1549.
#
#
#   Currently  (12-Dec-2023)  it is assumed that:
#
#     - XTAL #1  will be installed and will be 125 MHz
#
#     - XTAL #1  will provide its signal to both:
#                  - the prefered  MSS_REF_CLK_IN   P11, R11  in Bank #5   and
#                  - XCVR_0A_REF_CLK_IN   pins R23, R24  in the XCVR_0 section
#
#                NOTE:  for this double load to work we must be
#                       able to turn OFF the terminator in one of
#                       the two loads.  The 100 Ohm terminator in the
#                       XCVR Ref Clock 0A input can be set to open circuit.
#
#
#     - XTAL #2  is a spare and will not be installed
#
#     - XTAL #2  is wired to a prefered CCC clock input
#                 in Bank #7   CCC_SW_CLK_IN_W_0   aka
#                 GPIO_167P_B7 / CLKIN_W_0    G5,G4
#
#
#   For Reference:  Currently  (7-Dec-2023)  the other clocks that are
#                   provided to the FPGA/CPU come from the  AD9546
#                   Timing Generator  and are:
#
#                     Time Gen Output 1A  to  XCVR_1A_REF_CLK_IN   L23, L24   JESD Clock
#
#                     Time Gen Output 1B  to  CCC_SE_CLK_IN_S_9    J14, H14   a Spare Clk
#                                             GPIO11PB1/CLKIN_S_9   Bank #1
#




#
#     Crystal Oscillators  LVDS Outputs to the  FPGA/CPU:
#   -------------------------------------------------------
#

NET  'XTAL_1_Output_Dir'    Y1501-4    U1-P11    # XTAL #1 Output Dir  to
                                                 # MSS_REF_CLK_IN_P

NET  'XTAL_1_Output_Cmp'    Y1501-5    U1-R11    # XTAL #1 Output Cmp  to
                                                 # MSS_REF_CLK_IN_N

#   XTAL #1 also feeds  (but only one can be Terminated):

NET  'XTAL_1_Output_Dir'               U1-R23    # XTAL #1 Output Dir  to
                                                 # XCVR_0A_REF_CLK_IN_P

NET  'XTAL_1_Output_Cmp'               U1-R24    # XTAL #1 Output Cmp  to
                                                 # XCVR_0A_REF_CLK_IN_N




NET  'XTAL_2_Output_Dir'    Y1502-4    U1-G5     # XTAL #2 Output Dir  to
                                                 # GPIO_167P_B7 / CLKIN_W_0 / CCC_SW_CLKIN_W_O

NET  'XTAL_2_Output_Cmp'    Y1502-5    U1-G4     # XTAL #2 Output Cmp  to
                                                 # GPIO_167N_B7




#
#     Crystal Oscillator  Enable Pins:
#   ------------------------------------
#

NET  'XTAL_1_Enable'    Y1501-1   R1501-1    # HI Enable the Xtal #1 Output
NET  'XTAL_2_Enable'    Y1502-1   R1502-1    # HI Enable the Xtal #2 Output

NET  'XTAL_1_3V3'                 R1501-2    # Pull-Up Source
NET  'XTAL_2_3V3'                 R1502-2    # Pull-Up Source




#
#     3.3 Volt Power and Grounds to the  Crystal Oscillators:
#   -----------------------------------------------------------
#

NET  'BULK_3V3'      L1501-1               # Bulk_3V3 Power to Filter
NET  'XTAL_1_3V3'    L1501-2               # Filtered  XTAL #1  3V3 Power

NET  'XTAL_1_3V3'    C1501-2   C1503-2     # Filtered 3V3 Bypass Caps
NET  'GROUND'        C1501-1   C1503-1     # Ground Side of Filter Caps

NET  'XTAL_1_3V3'    Y1501-6               # Filtered 3V3 Power to XTAL #1
NET  'GROUND'        Y1501-3               # Ground  to XTAL #1



NET  'BULK_3V3'      L1502-1               # Bulk_3V3 Power to Filter
NET  'XTAL_2_3V3'    L1502-2               # Filtered  XTAL #2  3V3 Power

NET  'XTAL_2_3V3'    C1502-2   C1504-2     # Filtered 3V3 Bypass Caps
NET  'GROUND'        C1502-1   C1504-1     # Ground Side of Filter Caps

NET  'XTAL_2_3V3'    Y1502-6               # Filtered 3V3 Power to XTAL #2
NET  'GROUND'        Y1502-3               # Ground  to XTAL #2