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Semtech Corporation - Low-Power Keyboard Encoder for Portable Systems

Numéro de référence UR5HCFJ8-P
Description Low-Power Keyboard Encoder for Portable Systems
Fabricant Semtech Corporation 
Logo Semtech Corporation 





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UR5HCFJ8-P fiche technique
LapCoderTM UR5HCFJ8
Low-Power Keyboard
Encoder for Portable Systems
HID & SYSTEM MANAGEMENT PRODUCTS, KEYCODERTM FAMILY
DESCRIPTION
The LapCoderTM is a versatile, low-
power keyboard encoder for
portable systems. The UR5HCFJ8
provides two bi-directional channels
for communication with a BIOS-
compatible system as well as
any optional keyboard-compatible
devices, such as a 101/102 desktop
keyboard.
FEATURES
• Interfaces the Fujitsu FKB7211 or
other similar laptop/notebook
keyboards to a BIOS-compatible
systems
• AT / PS/2-compatible
• Interfaces an external keyboard /
keypad or other 8042-compatible
devices
• Low-power, single IC suitable for
3V battery-operated systems
• Implements all functions of an
101/102 keyboard with only
82-keys
• Available in DIP, PLCC and Quad
Flat packages
• Custom versions available in small
or large quantities
The UR5HCFJ8 fully supports the
IBM standard keyboard
communication 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 82 keys organized on
an 8x16 matrix and supports
embedded numeric keypad
functions as well as alternate scan
codes for specific keys, so that a
keyboard with only 82 keys is able
to emulate the functionality of a
101/102 keyboard.
In addition to the system’s keyboard
communication port the UR5HCFJ8
provides a fully functional keyboard
input port that can be used by a
standard 82/101/102 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 features of UR5HCFJ8 make it
ideal for use in PC/AT/PS/2
laptop/notebook designs that utilize
the Fujitsu FKB7211 low-profile, full-
travel membrane keyboard.
APPLICATIONS
• Laptop/Notebook
• Portable Equipment
• Industrial Keyboards
PIN DESCRIPTIONS
• POS Terminals
• Public Information Kiosks
6
_RESET
_IRQ
VX
NL
R6
RP
KD
1
2
3
4
5
6
7
RP 7
KD
KC
40 VCC
EKC
EKD
39 OSCI
CL 12
38 OSCO C0
37 EKC1
36 R7
35 SL
34 R5
C1
C2
C3
C4 17
18
KC 8
33 R4
EKC
EKD
CL
9
10
11
32 R3
DIP 31 R2
30 R1
C0 12
29 R0
C1 13
C2 14
C3 15
C4 16
C5 17
C6 18
C7 19
VSS 20
28 C8
27 C9
26 C10
25 C11
24 C12
23 C13
22 C14
21 C15
R6
RP
KD
KC
EKC
EKD
CL
C0
C1
C2
C3
1
PLCC
23
40
39 R7
SL
R5
R4
R3
34 R2
R1
R0
C8
C9
29 C10
28
QFP
SL
R5
R4
R3
R2
R1
R0
C8
C9
C10
C11
LapCoder is a trademark of Semtech Corp. All
other trademarks belong to their respective
companies.
Copyright Semtech, 1997-2001
DOC5-FJ8-DS-107
1
www.semtech.com

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