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UR5HCFJL Datasheet(PDF) 1 Page - Semtech Corporation

Part No. UR5HCFJL
Description  Zero-PowerTM Keyboard Encoder for Portable Systems
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Maker  SEMTECH [Semtech Corporation]
Homepage  http://www.semtech.com
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GreenCoderTM UR5HCFJL
Zero-PowerTM Keyboard
Encoder for Portable Systems
GreenCoder is a trademark of Semtech Corp. All
other trademarks belong to their respective
companies.
Copyright Semtech, 1997-2001
DOC5-FJL-DS-106
www.semtech.com
1
HID & SYSTEM MANAGEMENT PRODUCTS, KEYCODERTM FAMILY
DESCRIPTION
FEATURES
The GreenCoderTM (UR5HCFJL) is
a unique, Zero-PowerTM keyboard
encoder that provides an optimum
performance level for both battery-
operated and desktop systems.
The GreenCoderTM scans,
debounces and encodes an 8 X 16
keyboard matrix, and will provide
direct drive for 3 LEDs and two
bi-directional channels for
communication with a BIOS-
compatible system as well as an
additional keyboard-compatible
device. It fully supports all three
PS/2 scan code sets and will
implement up to three alternate
keyboard layers for full 101/102
functionality.
The GreenCoderTM employs a
unique Self-Power ManagementTM
method that reduces the power
consumption of the keyboard
sub-system to an unprecedented
minimum, transparently and without
user intervention. In “Active” mode,
the encoder consumes less than 2
mA (Typ @5V). In “Sleep” mode the
encoder consumes less than 2 µA
(Typ @5V) The encoder can even
nap between keystrokes and
therefore it is rarely active and
rarely consumes significant levels of
power.
A "stand-by" mode (600 µA Typ
@5V) is entered for as long as
a periodic task is active. After a
programmed period of user
inactivity the GreenCoderTM
gradually dims the LEDs for
further power savings.
The GreenCoderTM is ideal for use in
battery laptop/notebook designs
and Energy Star compliant
keyboards.
OPT
KD
KC
EKC
EKD
CL
C0
C1
C2
C3
C4
R7
SL
R5
R4
R3
R2
R1
R0
C8
C9
C10
40
1
6
7
12
17
18
23
28
29
34
39
PLCC
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
_RESET
DRV
VX
NL
R6
OPT
KD
KC
EKC
EKD
CL
C0
C1
C2
C3
C4
C5
C6
C7
GND
VCC
OSCI
OSCO
EKC1
R7
SL
R5
R4
R3
R2
R1
R0
C8
C9
C10
C11
C12
C13
C14
C15
DIP
R6
OPT
KD
KC
EKC
EKD
CL
C0
C1
C2
C3
SL
R5
R4
R3
R2
R1
R0
C8
C9
C10
C11
QFP
• Laptop/Notebook
• Portable Equipment
• Energy Star Compliant
• Medical Instruments
• Palmtops/ PDAs
• Wakes-up only to respond to an
external event and for a minimum
period of time (2 mA current
consumption)
• Provides interface for external
keyboard/keypad or other 8042-
compatible device
• Custom versions available in small
or large quantities
• Optimized power-saving operation
with idle consumption of less
than 2 µA
• Programmable LED dimming for
further power savings
• Ready to interface to Fujitsu's
7316, 7654,7656, and
1406 keyboards
• 3, 3.3 and 5 Volt operation
APPLICATIONS
PIN ASSIGNMENTS



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