67

Timing Diagram

To make a connection (close switch) between any two points, specify an ‘‘X’’ address, a ‘‘Y’’ address, set ‘‘DATA’’ high, and switch

‘‘Strobe’’ from low to high. To break a connection, follow this same procedure with ‘‘DATA’’ low.:

ADDRESS

STROBE

DATA

RESET

50%

50%

50%

50%

50%

50%

50%

90%

SWITCH

OUTPUT

90%

10%

TRUTH TABLE X AXIS

X ADDRESS

AX3

AX2

AX1

AX0

NOTE

X SWITCH

0000

X0

0001

X1

0010

X2

0011

X3

0100

X4

0101

X5

01104

No Connect

01114

No Connect

1000

X6

1001

X7

1010

X8

1011

X9

1100

X10

1101

X11

11104

No Connect

11114

No Connect

NOTE: 4. When X switch addresses are in these states, no change in

status will occur in switches between any X and Y points.

TRUTH TABLE Y AXIS

Y ADDRESS

AY2

AY1

AY0

Y SWITCH

000

Y0

001

Y1

010

Y2

011

Y3

100

Y4

101

Y5

110

Y6

111

Y7

DATA

X ADDRESS

Y ADDRESS

Example:

AX3

AX2

AX1

AX0

AY2

AY1

AY0

To connect switch X3 to switch Y4:

1

0

011100

To connect switch X6 to switch Y7:

1

1

000111

0

0011100

CD22M3493