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PDF ( 数据手册 , 数据表 ) UR5HC418-FN

零件编号 UR5HC418-FN
描述 AT / PS/2 - Compatible Keyboard Encoder
制造商 Semtech Corporation
LOGO Semtech Corporation LOGO 


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UR5HC418-FN 数据手册, 描述, 功能
DeskCoderTM UR5HC418
AT / PS/2 - Compatible
Keyboard Encoder
HID & SYSTEM MANAGEMENT PRODUCTS, KEYCODERTM FAMILY
DESCRIPTION
The DeskCoderTM 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 DeskCoderTM 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’s 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 DeskCoderTM is ideal for use in
low-power, low-cost and high-
reliability AT / PS/2 - compatible
keyboard designs.
Note: A version of the IC that
supports the PC/XT protocol is also
available. Contact Semtech for
more information.
FEATURES
• Interfaces contact switch matrix
keyboards to a BIOS-compatible
system
• Single IC desktop keyboard
encoder
• Provides interface for an external
keyboard/keypad or other 8042-
compatible devices
• AT / PS/2 - compatible
APPLICATIONS
• Desktop computers
• Instrumentation
• Industrial keyboards
PIN ASSIGNMENTS
• Implements all functions of a
101/102/104 keyboard
• Low-power HCMOS
microcontroller, suitable for 3-volt
battery-operated systems
• Available in DIP, PLCC and QFP
packages
• Custom versions available in small
or large quantities
• Point of sales terminals
• Public information kiosks
_RESET 1
40 VCC
_IRQ 2
39 OSCI
VX 3
38 OSCO
NL 4
37 EKC1
R6 5
36 R7
RP 6
35 SL
KD 7
34 R5
KC 8
33 R4
EKC 9
32 R3
EKD 10 DIP 31 R2
CL 11
30 R1
C0 12
29 R0
C1 13
28 C8
C2 14
27 C9
C3 15
26 C10
C4 16
25 C11
C5 17
24 C12
C6 18
23 C13
C7 19
22 C14
VSS/GND 20
21 C15
RP
KD
KC
EKC
EKD
CL
C0
C1
C2
C3
C4
6
7
12
17
18
R6
RP
KD
KC
EKC
EKD
CL
C0
C1
C2
C3
1
1
PLCC
23
QFP
40
39 R7
SL
R5
R4
R3
34 R2
R1
R0
C8
C9
29 C10
28
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 ©1997-2001 Semtech Corporation
DOC5-418-DS-109
1
www.semtech.com







UR5HC418-FN pdf, 数据表
SUGGESTED INTERFACING FOR THE UR5HC418
Vcc
100K
Vcc
STATUS LEDs
EKDAT
EKBCLK
KBCLK
KBDAT
4 X 47pF
1uF Vcc
GND
Vcc
1 44
5 12 38
RST Vcc
NL CL SL
4.7K 4.7K 2K 2K
11
10
41
Vcc
2
9
8
23
GND
LINE INTERFACE
EKD
EKC
EKC1
IRQ
KC
KD
NC
8042
EMULATION
PORT
44 Pin PLCC
PC KEYBOARD
PORT
COMMUNICATIONS
COLUMN
SELECT
OUTPUTS
C15
C14
C13
C12
C11
C10
C9
C8
C7
C6
C5
C4
C3
C2
C1
C0
C4A
ROW
DATA
INPUTS
R7A
R7
R6
R5
R4
R3
R2
R1
R0
OSCI
43
OSCO
42
Vss RP VXA
22 7 3
VX
4
1 MEG
4.00 MHz
GND
Vcc Vcc
Vcc
24
25
26
27
28
29
30
31
21
20
19
17
16
15
14
13
18
40
39
6
37
36
35
34
33
32
Vcc
8 x 22K
CS15
CS14
CS13
CS12
CS11
CS10
CS9
CS8
CS7
CS6
CS5
CS4
CS3
CS2
CS1
CS0
TO SWITCH MATRIX
RDAT7
RDAT6
RDAT5
RDAT4
RDAT3
RDAT2
RDAT1
RDAT0
GND
Copyright ©1997-2001 Semtech Corporation
DOC5-418-DS-109
8
www.semtech.com














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