Table of Contents
Advertisement
Model 35601A
Appendix B
A3 Board: U 2 0 1 , U207, U208
-hp- part number 1820-1442
mfr. part number SN74LS290N
V
CC
HOIS
■
T
J^UaUiU«Lfil..fi]f7]_
L
«8ID « c
R
9
«) }&
y
y
y
BCD COUNT SEQUENCE
COUNT
0
1
2
3
4
5
6
i
7
8
8
I
I
OUTPUT
Qd
Qc
L
L
L
L
H
H
H
H i
H
L |
H I
L I
I Qb
L
L
H
H
L <
L
H
H
L
L
fOa
[ T
H
L
H
L
H
L
H
L
H
RESET/COUNT FUNCTION TABLE
R0(1)
H
H
X
X
L
L
X
I
.
BESET INPUTS
R0(2)
H
H
X
L
X
X
L
1
R9(1)
L
X
H
X
L
X
1
L 1
1 R9(2)
! x
L
H
L
1
X
L
X
1
QD
L
L
H
OUTPUTS
[ QC
L '
L
L
nsr
L
L
L
CLEAR
CLEAR
|
CLEAR
CLEAR
1
ru
i
i
H
"9<2)
j a O *
"0(11
R
0(2|'
'jiiD*
Advertisement
Table of Contents
