Turning Ideas Into Reality

ABCircuits www.abcircuits.com POB 123 New Hill NC 27562 (919) 290-7104

Part Number KBDP64

Connection Diagram

KBDP64

15

9

16

17

18

19

5

6

7

8

10

11

13

14

22

12

20

23

28

21

24

4

25

3

26

2

27

1

COLX1

NC

COLX3

COLX5

COLX7

NC

ROWY8

ROWY6

ROWY4

ROWY2

COLX8

COLX6

COLX2

VSS

ROWY5

COLX4

ROWY1

ROWY7

VDD

ROWY3

DOUTA

DOUTB

DOUTC

DOUTD

DOUTE

DOUTF

NC

DATAAVAIL

Pin Description

Pin #

Description

Pin #

Description

1

Data Avail

28

VDD

2

DOut F (MSB)

27

NC

3

DOut D

26

DOut E

4

DOut B

25

DOut C

5

Row Y8

24

DOut A (LSB)

6

Row Y6

23

Row Y7

7

Row Y4

22

Row Y5

8

Row Y2

21

Row Y3

9

NC

20

Row Y1

10

Col X8

19

NC

11

Col X6

18

Col X7

12

Col X4

17

Col X5

13

Col X2

16

Col X3

14

VSS

15

Col X1

Col X1 – Col X8

These pins are open drain column driver outputs to the key matrix.

Row Y1 – Row Y8

These pins are the row inputs from the key matrix. These inputs have 5.6K (nominal) pull up

resistors on chip.

DOUTA - DOUTF

These are the parallel data outputs. DOut A is the least significant bit. These bits form a binary

code for the pressed key. These outputs keep their state even after the key is released.

Data Avail

This pin goes high when a key is pressed, and low when the key is released. In the case of a 2

key rollover, the pin goes low before the DOut bits change, then goes high again.

VSS

Connect to system ground.