!!!!    6    0    1  974695920  Vd6db                                         

! Device           : 74ls446
! Function         : Quadruple Bus Transceivers
! revision         : B.01.00
! safeguard        : high_out_lsttl
! Modifications    : Modified for AwareTest xi
!
  warning           "This library has not been verified with hardware."

combinatorial

!Note:   This device has outputs that can be set to the high impedance
!        state. To test for a high on the enable pins (GbarAB, GbarBA)
!        pullups are needed on A1 and B1.

vector cycle  500n
receive delay 400n

! warning "Pull-ups are required to test high-impedance outputs."

assign   VCC         to pins  16
assign   GND         to pins  8

assign   A4_A1       to pins  7,5,4,2
assign   A4          to pins  7
assign   A3          to pins  5
assign   A2          to pins  4
assign   A1          to pins  2

assign   B4_B1       to pins  9,11,12,14
assign   B4          to pins  9
assign   B3          to pins  11
assign   B2          to pins  12
assign   B1          to pins  14

assign   DIR1        to pins  13
assign   DIR2        to pins  3
assign   DIR3        to pins  6
assign   DIR4        to pins  10
assign   GbarBA      to pins  1
assign   GbarAB      to pins  15

family    TTL

power          VCC,GND

inputs         DIR1, DIR2, DIR3, DIR4, GbarBA, GbarAB

bidirectional  A4_A1, B4_B1
bidirectional  A4, A3, A2, A1, B4, B3, B2, B1

set load on groups A1,B1      to pull up

disable        A4_A1    with  GbarBA to "1"
disable        B4_B1    with  GbarAB to "1"

when GbarBA is "1" inactive A4_A1
when GbarAB is "1" inactive B4_B1

when DIR1 is "1" inputs A1
when DIR1 is "1" outputs B1
when DIR1 is "0" inputs B1
when DIR1 is "0" outputs A1

when DIR2 is "1" inputs A2
when DIR2 is "1" outputs B2
when DIR2 is "0" inputs B2
when DIR2 is "0" outputs A2

when DIR3 is "1" inputs A3
when DIR3 is "1" outputs B3
when DIR3 is "0" inputs B3
when DIR3 is "0" outputs A3

when DIR4 is "1" inputs A4
when DIR4 is "1" outputs B4
when DIR4 is "0" inputs B4
when DIR4 is "0" outputs A4

trace A1 to B1, DIR1, GbarBA, GbarAB
trace A2 to B2, DIR2, GbarBA, GbarAB
trace A3 to B3, DIR3, GbarBA, GbarAB
trace A4 to B4, DIR4, GbarBA, GbarAB

trace B1 to A1, DIR1, GbarBA, GbarAB
trace B2 to A2, DIR2, GbarBA, GbarAB
trace B3 to A3, DIR3, GbarBA, GbarAB
trace B4 to A4, DIR4, GbarBA, GbarAB
!***************************************************************
!***************************************************************

vector   Drive_B1_low_receive_A1
         drive B1                                !AT Modified
         receive A1                              !AT Modified
         set   GbarBA   to "0"
         set   DIR1     to "0"
         set   B1       to "0"                   !AT Modified
         set   A1       to "1"                   !AT Modified
end vector

vector   Drive_B2_low_receive_A2
         drive B2                                !AT Modified
         receive A2                              !AT Modified
         set   GbarBA   to "0"
         set   DIR2     to "0"
         set   B2       to "0"                   !AT Modified
         set   A2       to "1"                   !AT Modified
end vector

vector   Drive_B3_low_receive_A3
         drive B3                                !AT Modified
         receive A3                              !AT Modified
         set   GbarBA   to "0"
         set   DIR3     to "0"
         set   B3       to "0"                   !AT Modified
         set   A3       to "1"                   !AT Modified
end vector

vector   Drive_B4_low_receive_A4
         drive B4                                !AT Modified
         receive A4                              !AT Modified
         set   GbarBA   to "0"
         set   DIR4     to "0"
         set   B4       to "0"                   !AT Modified
         set   A4       to "1"                   !AT Modified
end vector

vector   Drive_B1_high_receive_A1
         drive B1                                !AT Modified
         receive A1                              !AT Modified
         set   GbarBA   to "0"
         set   DIR1     to "0"
         set   B1       to "1"                   !AT Modified
         set   A1       to "0"                   !AT Modified
end vector

vector   Drive_B2_high_receive_A2
         drive B2                                !AT Modified
         receive A2                              !AT Modified
         set   GbarBA   to "0"
         set   DIR2     to "0"
         set   B2       to "1"                   !AT Modified
         set   A2       to "0"                   !AT Modified
end vector

vector   Drive_B3_high_receive_A3
         drive B3                                !AT Modified
         receive A3                              !AT Modified
         set   GbarBA   to "0"
         set   DIR3     to "0"
         set   B3       to "1"                   !AT Modified
         set   A3       to "0"                   !AT Modified
end vector

vector   Drive_B4_high_receive_A4
         drive B4                                !AT Modified
         receive A4                              !AT Modified
         set   GbarBA   to "0"
         set   DIR4     to "0"
         set   B4       to "1"                   !AT Modified
         set   A4       to "0"                   !AT Modified
end vector

vector   Drive_A1_low_receive_B1
         drive A1                                !AT Modified
         receive B1                              !AT Modified
         set   GbarAB   to "0"
         set   DIR1     to "1"
         set   A1       to "0"                   !AT Modified
         set   B1       to "1"                   !AT Modified
end vector

vector   Drive_A2_low_receive_B2
         drive A2                                !AT Modified
         receive B2                              !AT Modified
         set   GbarAB   to "0"
         set   DIR2     to "1"
         set   A2       to "0"                   !AT Modified
         set   B2       to "1"                   !AT Modified
end vector

vector   Drive_A3_low_receive_B3
         drive A3                                !AT Modified
         receive B3                              !AT Modified
         set   GbarAB   to "0"
         set   DIR3     to "1"
         set   A3       to "0"                   !AT Modified
         set   B3       to "1"                   !AT Modified
end vector

vector   Drive_A4_low_receive_B4
         drive A4                                !AT Modified
         receive B4                              !AT Modified
         set   GbarAB   to "0"
         set   DIR4     to "1"
         set   A4       to "0"                   !AT Modified
         set   B4       to "1"                   !AT Modified
end vector

vector   Drive_A1_high_receive_B1
         drive A1                                !AT Modified
         receive B1                              !AT Modified
         set   GbarAB   to "0"
         set   DIR1     to "1"
         set   A1       to "1"                   !AT Modified
         set   B1       to "0"                   !AT Modified
end vector

vector   Drive_A2_high_receive_B2
         drive A2                                !AT Modified
         receive B2                              !AT Modified
         set   GbarAB   to "0"
         set   DIR2     to "1"
         set   A2       to "1"                   !AT Modified
         set   B2       to "0"                   !AT Modified
end vector

vector   Drive_A3_high_receive_B3
         drive A3                                !AT Modified
         receive B3                              !AT Modified
         set   GbarAB   to "0"
         set   DIR3     to "1"
         set   A3       to "1"                   !AT Modified
         set   B3       to "0"                   !AT Modified
end vector

vector   Drive_A4_high_receive_B4
         drive A4                                !AT Modified
         receive B4                              !AT Modified
         set   GbarAB   to "0"
         set   DIR4     to "1"
         set   A4       to "1"                   !AT Modified
         set   B4       to "0"                   !AT Modified
end vector

vector   Disable_A_bus
         drive B4_B1
         receive A4_A1
         set   GbarBA   to "1"
         set   DIR1     to "0"
         set   B4_B1    to "zzz1"
         set   A4_A1    to "xxx1"
end vector

vector   Disable_B_bus
         drive A4_A1
         receive B4_B1
         set   GbarAB   to "1"
         set   DIR1     to "1"
         set   A4_A1    to "zzz1"
         set   B4_B1    to "xxx1"
end vector

!***************************************************************
!***************************************************************

!****************************************************************
! warning "Inorder to test Three State outputs this test needs modification"

unit "awaretest B1_A1"                !AT Modified the unit name
   execute   Drive_B1_low_receive_A1
   execute   Drive_B1_high_receive_A1
end unit                              !AT Added a new "end unit"

unit "awaretest B2_A2"                !AT Added this unit
   execute   Drive_B2_low_receive_A2
   execute   Drive_B2_high_receive_A2
end unit                              !AT Added a new "end unit"

unit "awaretest B3_A3"                !AT Added this unit
   execute   Drive_B3_low_receive_A3
   execute   Drive_B3_high_receive_A3
end unit                              !AT Added a new "end unit"

unit "awaretest B4_A4"                !AT Added this unit
   execute   Drive_B4_low_receive_A4
   execute   Drive_B4_high_receive_A4
end unit                              !AT Added a new "end unit"

unit "awaretest A1_B1"                !AT Added this unit
   execute   Drive_A1_low_receive_B1
   execute   Drive_A1_high_receive_B1
end unit                              !AT Added a new "end unit"

unit "awaretest A2_B2"                !AT Added this unit
   execute   Drive_A2_low_receive_B2
   execute   Drive_A2_high_receive_B2
end unit                              !AT Added a new "end unit"

unit "awaretest A3_B3"                !AT Added this unit
   execute   Drive_A3_low_receive_B3
   execute   Drive_A3_high_receive_B3
end unit                              !AT Added a new "end unit"

unit "awaretest A4_B4"                !AT Added this unit
   execute   Drive_A4_low_receive_B4
   execute   Drive_A4_high_receive_B4
end unit

unit "unit2 test enables"
  execute   Disable_A_bus
  execute   Disable_B_bus
end   unit

!End of test