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參數(shù)資料
| 型號： | UR5HCFJ8-P |
| 廠商： | Semtech Corporation |
| 英文描述： | Low-Power Keyboard Encoder for Portable Systems |
| 中文描述： | 低功耗便攜式鍵盤編碼器系統(tǒng) |
| 文件頁數(shù)： | 3/16頁 |
| 文件大?。?/td> | 195K |
| 代理商： | UR5HCFJ8-P |
FUNCTIONAL DESCRIPTION
PIN DEFINITIONS
Copyright Semtech, 1997-2001
DOC5-FJ 8-DS-107
www.semtech.com
3
The UR5HCFJ 8 consists functionally
of six major sections (see Functional
Diagram, previous page). These
are the Keyboard Encoder, the
Mode Control Unit, the PC
Communication Channel, the Data
Buffer, the Interrupt Control and the
8042 Emulation Channel. All
sections communicate with each
other and operate concurrently.
Mnemonic DIP
VCC
VSS
OSCI
OSCO
_RESET
EKC1
PLCC
QFP
38
17
37
36
41
35
Type
Name and Func tion
Power S upply:
+5V
Ground
Osc illator input
Osc illator output
Reset:
Apply 0V to provide orderly start-up
External K eyboard Cloc k 1
: Connects
to external keyboard Clock Line and is used
to generate an interupt for every Clock Line
transition.
Tie to Vcc
Tie to Vcc
Reserved:
Ties to Vcc
K eyboard Cloc k:
Connects to PC
keyboard port clock line
K eyboard Data:
Connects to
PC port data line
External K eyboard Data:
Connects to
external keyboard Data Lne
External K eyboard Cloc k:
Connects
to external keyboard Clock Line
Interrupt Line:
Reserved for low-power
applications
Row Data Inputs
40
20
39
38
44
22
43
42
I
I
I
O
1
1
I
37
41
VX
VXA
RP
KC
3
4
3
7
9
43
I
I
I
6
8
2
4
I/O
KD
7
8
3
I/O
EKD
10
11
6
I/O
ECK
9
10
5
I/O
_IQR
2
2
42
I
R0-R5
R6
R7
C0-C7
29-34
32-37
27-32
I
I
I
5
6
1
36
39
34
12-19
13-17
19-21
31-24
8-15
O
O 16 columns
O
O
O
Caps Loc k LED
O
Num Loc k LED
O
S c roll Loc k LED
No Connec ts:
These pins are unused.
Column S elec t Outputs:
Selects 1 of
C8-C15
28-21
26-23
21-18
CL
NL
SL
NC
11
12
7
4
5
44
33
35
38
18
16,22
39,40
23,40
Note:
An underscore before a pin mnemonic denotes an active low signal.
KEYBOARD ENCODER
The controller continuously scans a
keyboard organized as an 8 row by
16 column matrix for a maximum of
128 keys. Smaller-size keyboards
are supported provided that all
unused row lines are pulled to Vcc.
The IC selects 1 of the 16 column
lines (C0-C15) every 512 mS and
then reads the row data lines (R0-
R7). A key closure is detected as a
0 in the corresponding position of
the matrix. A complete scan cycle
for the entire keyboard takes
approximately 9.2 mS. Each key
found pressed is debounced for a
period of 20 mS. Once the key is
verified, the corresponding key
code(s) are loaded into the transmit
buffer of the PC Communication
Channel.
S witc h Matrix Enc oding
Each matrix location is programmed
to represent either a single key or a
key combination of the IBM 101/102
standard keyboard.
S c an Code Table S ets
The UR5HCFJ 8 supports all three
scan code table sets. Scan Code
Sets 1 and 2 are the default sets for
AT/PS/2 systems. Scan Code Table
Set 3 allows the user to program
individual key attributes such as
Make/Break and Typematic or
Single-Touch Action. For more
information, refer to the IBM
Technical Reference Manuals.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UR5HCFJL | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Zero-PowerTM Keyboard Encoder for Portable Systems |
| UR5HCFJL-06-P | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:ENCODER|DIP|40PIN|PLASTIC |
| UR5HCFJL-16-P | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:ENCODER|DIP|40PIN|PLASTIC |
| UR5HCFJL-FB | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Zero-PowerTM Keyboard Encoder for Portable Systems |
| UR5HCFJL-FN | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Zero-PowerTM Keyboard Encoder for Portable Systems |
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