Function Table - Philips PM2517E Service Manual

42
t,
t_
t
t
r
I
t-
r
L
r
t -
t
t
t
t
t
t ,
t
?
t
t ,
t ;
F U N C T I O N T A B L E
H
= H IGH state (the more positjve voltage)
L
= LOW state (the less positive voltage)
X
= state is immaterial
H
= L o s i c l = 0 V
L
= L o g i c o = - 8 . 5 V
' D e p e n d s
u p o n t h e B C D c o d e a p p l i e d d u r i n g t h e L O W t o H I G H t r a n s i t j o n o f E L .
D I S P L A Y
rnputs
ouTpurs
d i s p l a y
EL
l B I T L
4 3
A2
A 1
A g
a b c d e f
s
X X L
X L H
L
L
L
L
H H
H H
H H
H H
H H
H H
H H
H H
H H
H H
H H
H H
H H
H H
H H
H H
H H
L
L
L
i
L
L
L
L
X
X
X
X
X
X
X
X
L
L
11
L
L
L
;
H
rt
L
L
L
L
n
H
n
I
L
;
n
H
11
L
;
a
n
H
L
;
H
TI
11
TI
n
n
L
n
11
L
;
X
H H
L
n
L
11
L
H
L
TI
H
L
TI
L
11
L
H
rl
t-l
H
H
FI
F
L
FI
n
L
n
L
L
L
H
L
L
n
FI
a
TI
n
;
TI
I
H
n
L
FI
11
H
L
n
L
L
n
11
L
L
F
H
L
11
L
L
n
L
L
L
H
TI
I
n
L
L
L
a
L
'-
L
L
L
L
L
L
L
L
L
L
I
L
L
L
L
t
L
8
b l a n k
0
I
2
3
4
5
6
7
8
I
o l a n K
b l a n k
b l a n k
b l a n k
b l a n k
b l a n k
l t
l l
I
I
I
t-
I
-t
t_l
I
-l
t_
l_l
I
tTt
t t
-t
Fig.29-