Appendix C - Pal Equations - Aeroflex TCAS-201-2 Maintenance Manual

1 . E q u a t i o n D e f i n i t i o n s
XXX
= A ct i ve L o w S i g n a l
* = A N D
→ = G o T o
/ = I n v e r t
: = O n C l o ck R i si n g E d g e
+ = O R
2 . D i g i t a l I F P C B A ssy
A . D i g i t i z e r C o n t r o l P A L ( U 2 6 0 1 5 )
( 1 ) P i n A s s i g n m e n t s
P I N N O .
1
2
3
4
5
( 2 ) E q u a t i o n s
D I G C L K = / N C * / R A M W R * C L K 2 + N C + R A M W R
L O W B = / ( / A 1 4 * A 1 5 * / S T R B * / D S )
N C : = R C O + N C * T R I G
E N A : = / ( R A M W R * N C + / E N A * N C )
D R D Y : = / [ R A M W R * E N A + / D R D Y * / ( / A 1 4 * A 1 5 * / S T R B * / D S ) * T R I G ]
R A M W R : = N C
RAMQ =CLK2*/NC*/RAM WR + (NC+RAM WR)*/(A0*/A14*A15*/STRB*/DS)
RAMI =CLK2*/NC*/RAM WR + (NC+RAM WR)*/(/A0*/A14*A15*/STRB*/DS)
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APPENDIX C - PAL EQUATIONS

S I G N A L P I N N O . S I G N A L
C L K 1 6
C L K 2 7
D S 8
S T R B 9
A 0 1 0
MAINTENANCE MANUAL
TCAS- 201-2
P I N N O . S I G N A L
A 1 4 1 1
A 1 5 1 2 D I G C L K
T R I G 1 3 L O W B
R C O 1 4
G N D 1 5
P I N N O . S I G N A L
O E 1 6 D R D Y
1 7 R A M W R
1 8 R A MQ
N C 1 9 R A MI
E N A 2 0 V C C
A P P E N D I X C
P a g e 1
S e p 1 / 0 4