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DeskCoder

TM

UR5HC418

AT / PS/2 - Compatible

Keyboard Encoder

HID & SYSTEM MANAGEMENT PRODUCTS, KEYCODER

TM

FAMILY

DESCRIPTION

The DeskCoder

TM

keyboard encoder

functions as a versatile, low-power

desktop keyboard encoder, while

providing two bi-directional

channels for communication with a

BIOS-compatible system as well as

any optional keyboard-compatible

devices, such as a 101/102/104

desktop keyboard, OCR, barcode

reader, etc.

The DeskCoder

TM

fully supports the

IBM standard keyboard communi-

cation protocol; each key press

generates one of the scan codes

designated in the IBM Technical

Reference Manuals. The keyboard

encoder handles the scanning,

debounce, and encoding of 128

keys organized on an 8 x 16 matrix.

In addition to the system鈥檚 keyboard

communication port, the UR5HC418

provides a fully functional keyboard

input port that can be used by a

standard 101/102/104 keyboard or

another 8042-compatible device,

such as an external numeric

keypad, an OCR, or a bar-code

reader. Input from both the matrix

and the external device is

multiplexed and presented to the

system as if it were coming from a

single source.

The DeskCoder is ideal for use in

low-power, low-cost and high-

reliability AT / PS/2 - compatible

keyboard designs.

TM

FEATURES

鈥?Interfaces contact switch matrix

keyboards to a BIOS-compatible

system

鈥?Single IC desktop keyboard

encoder

鈥?Provides interface for an external

keyboard/keypad or other 8042-

compatible devices

鈥?AT / PS/2 - compatible

APPLICATIONS

鈥?Desktop computers

鈥?Instrumentation

鈥?Industrial keyboards

PIN ASSIGNMENTS

鈥?Point of sales terminals

鈥?Public information kiosks

鈥?Implements all functions of a

101/102/104 keyboard

鈥?Low-power HCMOS

microcontroller, suitable for 3-volt

battery-operated systems

鈥?Available in DIP, PLCC and QFP

packages

鈥?Custom versions available in small

or large quantities

6

RP

KD

KC

EKC

EKD

CL

C0

C1

C2

C3

C4

7

1

R6

NL

VX

VXA

_IRQ

_RESET

VCC

OSCI

OSC0

EKC1

R7A

40

39

_RESET

_IRQ

VX

NL

R6

RP

KD

KC

EKC

EKD

CL

C0

C1

C2

C3

C4

C5

C6

C7

VSS/GND

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

40

39

38

37

36

35

34

33

32

31

30

29

28

27

26

25

24

23

22

21

VCC

OSCI

OSCO

EKC1

R7

SL

R5

R4

R3

R2

R1

R0

C8

C9

C10

C11

C12

C13

C14

C15

12

PLCC

34

17

18

23

29

28

R7

SL

R5

R4

R3

R2

R1

R0

C8

C9

C10

DIP

NL

VX

_IRQ

_RESET

NC

NC

VCC

OSCI

OSCO

EKC1

R7

C4A

C5

C6

C7

VSS/GND

NC

C15

C14

C13

C12

C11

Note: A version of the IC that

supports the PC/XT protocol is also

available. Contact Semtech for

more information.

R6

RP

KD

KC

EKC

EKD

CL

C0

C1

C2

C3

1

QFP

NL

R5

R4

R3

R2

R1

R0

C8

C9

C10

C11

DeskCoder and KeyCoder are trademarks of

Semtech Corporation. All other trademarks

belong to their respective companies.

Copyright 漏1997-2001 Semtech Corporation

DOC5-418-DS-109

1

www.semtech.com

C4

C5

C6

C7

NC

VSS/GND

C15

C14

C13

C12

NC

next

UR5HC418-FN相關(guān)型號(hào)PDF文件下載

• 型號(hào)
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• UR5HCFJL-P
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• UR5HCFJ8-F...
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