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UR5HCFJL-P Schematic ( PDF Datasheet ) - Semtech Corporation

Teilenummer UR5HCFJL-P
Beschreibung Zero-PowerTM Keyboard Encoder for Portable Systems
Hersteller Semtech Corporation
Logo Semtech Corporation Logo 




Gesamt 20 Seiten
UR5HCFJL-P Datasheet, Funktion
GreenCoderTM UR5HCFJL
Zero-PowerTM Keyboard
Encoder for Portable Systems
HID & SYSTEM MANAGEMENT PRODUCTS, KEYCODERTM FAMILY
DESCRIPTION
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.
FEATURES
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
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
APPLICATIONS
Laptop/Notebook
Portable Equipment
Energy Star Compliant
Medical Instruments
Palmtops/ PDAs
PIN ASSIGNMENTS
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.
_RESET 1
40 VCC
DRV 2
39 OSCI
VX 3
38 OSCO
NL 4
37 EKC1
R6 5
36 R7
OPT 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
GND 20
21 C15
R6
OPT
KD
KC
EKC
EKD QFP
CL
C0
C1
C2
C3
SL
R5
R4
R3
R2
R1
R0
C8
C9
C10
C11
OPT
KD
KC
EKC
EKD
CL
C0
C1
C2
C3
C4
6
7
12
17
18
1
PLCC
23
40
39 R7
SL
R5
R4
R3
34 R2
R1
R0
C8
C9
29 C10
28
The GreenCoderTM is ideal for use in
battery laptop/notebook designs
and Energy Star compliant
keyboards.
GreenCoder is a trademark of Semtech Corp. All
other trademarks belong to their respective
companies.
Copyright Semtech, 1997-2001
DOC5-FJL-DS-106
1
www.semtech.com






UR5HCFJL-P Datasheet, Funktion
PC COMMUNICATION
The UR5HCFJL implements all the
standard functions of
communication with a BIOS-
compatible PC/XT or AT/PS/2 host
system. Two lines, KC and KD,
provide bi-directional clock and
data signals. In addition, the
UR5HCFJL supports all commands
from and to the system, as
described in the IBM Technical
Reference Manuals.
The following table shows the
commands that the system may
send and their values in hex.
Command
Hex Value
Set/Reset Status
Indicators
ED
Echo
EE
Invalid Command
EF
Select Alternate
Scan Codes
F0
Invalid Command
F1
Read ID
F2
Set Typematic
Rate/Delay
F3
Enable
F4
Default Disable
F5
Set Default
F6
Set All Keys
Typematic
Make/Break
Make
Typematic/Make/Break
F7
F8
F9
FA
Set Key Type
Typematic
Make/Break
Make
FB
FC
FD
Resend
FE
Reset
FF
Table 2: Keyboard Commands from the
System (AT/PS/2 protocol)
These commands are supported in
the AT/PS/2 protocol and can be
sent to the keyboard at any time.
The following table shows the
commands that the keyboard may
send to the system.
Command
Hex Value
Key Detection
Error/Overrun
00*
Keyboard ID
83AB
BAT Completion Code
AA
BAT Failure Code
FC
Echo
EE
Acknowledge (Ack)
FA
Resend
FE
Key Detection
Error/Overrun
FF**
*Code Sets 2 and 3
**Code Set 1
Table 3: Keyboard Commands to the
System (AT/PS/2 protocol)
When an external keyboard is
connected, commands from the
system will also be directed to the
external keyboard. Presence or
absence of an external device will
not effect the normal operation of
the GreenCoderTM.
Copyright Semtech, 1997-2001
DOC5-FJL-DS-106
6
www.semtech.com

6 Page









UR5HCFJL-P pdf, datenblatt
KEY MAP FOR THE GREENCODERTM UR5HCFJL-7654
0
0
Rows (R0-R7)
12 3 4 5 6 7
FN
1 LWin
2 Tab CapsLk 1 S Z A Q Esc
3 RAlt LAlt
4
F1
F2 F3
E
DW
2
X
5
8/N8 9/N9 I/N5
, Space K/N2 U/N4 M/N0
6 F6 3 4 F C R 5 F4
7 F9 F5 6 V B G T F7
8
F10 F11 F8
N
H
Y 7/N7 J/N1
9 F12 0/N* O/N6 ./N.
L/N3 NumLk/
FScrlLk
10 Pause =
]
\
[`
11 BkSp DnArr/ UpArr/ WinApp Enter
FPgDn FPgUp
Ins/
FPrtScr
12 RWin
13 RArr/ LArr/ Del/ / / N/
FEnd FHome FSysReq
14 LCtrl
15 LShft
RShft
;/N+ P/N-
-
RCtrl
Note1: The letter N in italics, followed by a number or symbol, indicates that key in Num
Case.
Note2: The letter F in italics, followed by a key function, indicates that key in Function
Case.
Copyright Semtech, 1997-2001
DOC5-FJL-DS-106
12
www.semtech.com

12 Page





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