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参数资料
| 型号： | K25C81 |
| 厂商： | Semtech Corporation |
| 英文描述： | Versatile PC/XC/AT/PS/2 Compatible Keyboard Encoder |
| 中文描述： | 多功能PC/XC/AT/PS/2兼容键盘编码器 |
| 文件页数： | 1/12页 |
| 文件大小： | 124K |
| 代理商： | K25C81 |
FlexiCoder
T M
K 25C81
Versatile PC/XC/AT/PS/2 Compatible
Keyboard Encoder
FlexiCoder
TM
is a trademark of Semtech Corp. All
other trademarks belong to their respective
companies.
Copyright Semtech, 1997-2001
DOC5-C81-DS-105
www.semtech.com
1
HID & S Y S T EM MANAGEMENT PRODUCT S , K EY CODER
T M
FAMILY
DESCRIPTION
FEATURES
1
_RESET
40
Vcc
OSCI
OSCO
EKC1
R7
NC
R5
R4
R3
R2
R1
R0
C8
C9
C10
C11
C12
C13
C14
C15
_IRQ
VX
C17
R6
RP
KD
KC
EKC
EKD
C16
C0
C1
C2
C3
C4
C5
C6
C7
Vss
2
39
3
38
4
37
5
36
6
35
7
34
8
33
9
32
10
31
11
30
12
29
13
28
14
27
15
26
16
25
17
24
18
23
19
22
20
21
DIP
R
C
V
N
_
_
V
O
O
E
N
RP
KD
KC
EKC
EKD
C16
C0
C1
C2
C3
C4
R7
NC
R5
R4
R3
R2
R1
R0
C8
C9
C10
N
C
C
C
V
N
C
C
C
C
C
40
1
6
7
12
17
18
23
28
29
34
39
R6
RP
KD
KC
EKC
EKD
C16
C0
C1
C2
C3
C
V
_
_
N
N
V
O
O
E
R
NC
R5
R4
R3
R2
R1
R0
C8
C9
C10
C11
C
C
C
C
N
V
C
C
C
C
N
1
PLCC
QFP
Custom keyboards/keypads
Control panels
Automatic teller machines
Embedded control systems
Public Information Kiosks
Instrumentation
Test and Measurement equipment
Point of Sales terminals
Industrial Controllers
Medical Instruments
Enables custom keypad scan
codes to remain unaffected by
the Shift States of an external
keyboard
Includes jumper-selectable auto-
repeat for designated keys
Offers two-key inhibit scanning
mode
Directly interfaces a PC
keyboard port
Encodes up to 144 custom keys
on an 8 X 18 matrix
Buffers up to 122 keycodes
Interfaces to 83/101/102
standard keyboard or other
8042-compatible device
The FlexiCoder
TM
is a versatile, low-
power keyboard encoder. It offers
two bi-directional channels for
communicating with a
PC/XT/AT/PS2 system, and/or any
optional keyboard-compatible
devices, such as an 83 or 101/102
standard desktop keyboard, OCR,
barcode reader, etc. The K25C81
directly interfaces a PC keyboard
port, making custom keyboard to
system communications fully
transparent.
On an 8 x 18 matrix, the
FlexiCoder
TM
will scan, debounce
and encode up to 144 keys. Scan
codes corresponding to single keys
of the IBM 101 keyboard, or a
combination of these keys when
depressed with Shift, Ctrl, and Alt
keys, are generated with each key
press. Custom keypad input is not
effected by the Shift States of an
external keyboard.
Users can conveniently define key
assignments on the matrix as single
or repeating actions. All keys must
be released between key strokes or
scanning is suspended. The
encoder can buffer up to 122
keycodes, and control inputs and
outputs are provided for interfacing
with contact keyboards.
The FlexiCoder
TM
is ideal for use
with either BIOS-compatible chip
sets or single-board computers for
PC systems requiring a custom
keyboard / keypad as an alternate
or additional input device. Boards
and evaluation kits are immediately
obtainable and ready to connect.
APPLICATIONS
PIN ASSIGNMENTS
相关PDF资料 |
PDF描述 |
|---|---|
| K25C81-FB | Versatile PC/XC/AT/PS/2 Compatible Keyboard Encoder |
| K25C81-FN | Versatile PC/XC/AT/PS/2 Compatible Keyboard Encoder |
| K25C81-P | Versatile PC/XC/AT/PS/2 Compatible Keyboard Encoder |
| K270 | surface mount silicon Zener diodes |
| K240 | surface mount silicon Zener diodes |
相关代理商/技术参数 |
参数描述 |
|---|---|
| K25C81-FB | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Versatile PC/XC/AT/PS/2 Compatible Keyboard Encoder |
| K25C81-FN | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Versatile PC/XC/AT/PS/2 Compatible Keyboard Encoder |
| K25C81-P | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Versatile PC/XC/AT/PS/2 Compatible Keyboard Encoder |
| K25F | 制造商:VMI 制造商全称:VMI 功能描述:2,500 V - 10,000 V Rectifiers 1.5 A - 3.0 A Forward Current 200 ns Recovery Time |
| K25S | 制造商:VMI 制造商全称:VMI 功能描述:Spice Model |
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