#             This is a Key In  Net List  file for
#                 the  H-CLK  card for  HAWC

#         VME Data Bus  to  On Card Bus Data Bus  Nets
#       ------------------------------------------------

#
#                                                 Original Rev. 21-Apr-2011
#                                              Most Recent Rev. 7-July-2011


#  This file is the 16 nets that bring the backplane VME data bus
#  onto the  H-CLK  card.  The backplane VME data bus is received and
#  driven by  U1004  a  74LVT16245B  16 bit Transceiver. 


#  These circuits are shown in the drawing:
#
#      www.pa.msu.edu/~edmunds/
#                                      
#                                    



#  This file contains the nets for the following components:
#
#     U304          74LVT16245B      16 bit Transceiver for VME Data lines
#
#     C314, C316   100 uFd          bypass capacitors to Vdd_Logic
#
#     C313, C315   4.7 nFd          bypass capacitors to Vdd_Logic





#  Connect U304 the Transceiver for the data bus  VME <-> On_Card_Bus.
#  VME is connected to the B side of the  74LVT16245B Transceiver.
#  The On_Card_Bus is connected to the A side.


NET 'OCB_DATA(7)'    U304-47    # 1A0
NET 'VME_DATA(7)'    U304-2     # 1B0

NET 'OCB_DATA(15)'   U304-46    # 1A1
NET 'VME_DATA(15)'   U304-3     # 1B1

NET 'OCB_DATA(6)'    U304-44    # 1A2
NET 'VME_DATA(6)'    U304-5     # 1B2

NET 'OCB_DATA(14)'   U304-43    # 1A3
NET 'VME_DATA(14)'   U304-6     # 1B3

NET 'OCB_DATA(5)'    U304-41    # 1A4
NET 'VME_DATA(5)'    U304-8     # 1B4

NET 'OCB_DATA(13)'   U304-40    # 1A5
NET 'VME_DATA(13)'   U304-9     # 1B5

NET 'OCB_DATA(4)'    U304-38    # 1A6
NET 'VME_DATA(4)'    U304-11    # 1B6

NET 'OCB_DATA(12)'   U304-37    # 1A7
NET 'VME_DATA(12)'   U304-12    # 1B7



NET 'OCB_DATA(3)'    U304-36    # 2A0
NET 'VME_DATA(3)'    U304-13    # 2B0

NET 'OCB_DATA(11)'   U304-35    # 2A1
NET 'VME_DATA(11)'   U304-14    # 2B1

NET 'OCB_DATA(2)'    U304-33    # 2A2
NET 'VME_DATA(2)'    U304-16    # 2B2

NET 'OCB_DATA(10)'   U304-32    # 2A3
NET 'VME_DATA(10)'   U304-17    # 2B3

NET 'OCB_DATA(1)'    U304-30    # 2A4
NET 'VME_DATA(1)'    U304-19    # 2B4

NET 'OCB_DATA(9)'    U304-29    # 2A5
NET 'VME_DATA(9)'    U304-20    # 2B5

NET 'OCB_DATA(0)'    U304-27    # 2A6
NET 'VME_DATA(0)'    U304-22    # 2B6

NET 'OCB_DATA(8)'    U304-26    # 2A7
NET 'VME_DATA(8)'    U304-23    # 2B7




#  Connect the two  Direction  pins of the 74LVT16245B Transceiver.
#    When low  ->  B input  A output   i.e. VME Write
#    When high ->  A input  B output   i.e. VME Read

NET 'DATA_BUF_DIR'     U304-1    U304-24



#  Connect the two  Output Enable bar  pins of the 74LVT16245B Transceiver.
#    When high -> neither buffer output is enabled.

NET 'DATA_BUF_ENB_B'   U304-25   U304-48 




#  Connect the Vdd power supply pins to the 74LVT16245B Transceiver.

NET 'VDD_LOGIC'   U304-7    U304-18    U304-31    U304-42



#  Connect the Ground pins to the 74LVT16245B Transceiver.

NET 'GROUND'    U304-4     U304-10    U304-15    U304-21
NET 'GROUND'    U304-28    U304-34    U304-39    U304-45




#  Now include the nets for the bypass capacitors on this Transceiver.

#  100 nFd  Ceramic

NET 'VDD_LOGIC'  C314-1   C316-2
NET 'GROUND'     C314-2   C316-1


#  4.7 nFd  Ceramic

NET 'VDD_LOGIC'  C313-2   C315-1
NET 'GROUND'     C313-1   C315-2