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| 型號： | SH2165-FGT |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | SPECIALTY MICROPROCESSOR CIRCUIT, PQFP64 |
| 封裝： | 10 X 10 MM, 0.50 MM PITCH, ROHS COMPLIANT, LQFP-64 |
| 文件頁數(shù)： | 7/33頁 |
| 文件大?。?/td> | 354K |
| 代理商： | SH2165-FGT |
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KEYBOARD MATRIX DESIGN
EXAMPLE KEYBOARD MATRIX (FUJITSU FKB7654)
Copyright 1999-2005 Semtech Corporation
SH2165 data sheet v1.08 (2005-05-17)
www.semtech.com
15
SH2165
The following factors must be considered when
designing a keyboard matrix.
Because of the “ghost” key problem described in a
previous section, shift-type keys should be treated
carefully when designing a matrix. Shift-type keys are
keys that are held down while other keys are pressed:
Shift, Alt, Control, Win (or GUI), and Function.
(A) Some columns (or rows) should be set aside for
shift-type keys only, and all shift-type keys should be
assigned to those columns (or rows).
(B) Cases where shift-type keys share a row or a
column should be kept to a minimum. If possible, two
shift-type keys should not share a row or column with
each other unless their function is the same, or they are
very unlikely to be used together, or both.
For example, see this diagram of the standard matrix
for the Fujitsu FKB7654 laptop-type keyboard.
(A) All shift-type keys are assigned to columns 0, 1, 3,
12, 14, and 15, and only shift-type keys are assigned to
those columns.
(B) There are only four cases where shift-type keys
share a row or a column, and only two keys in each
case, seven keys total:
1. Function and Left Alt in row 7
2. Right Alt and Left Alt in column 3
3. Right Control and Left Control in column 14
4. Right Shift and Left Shift in column 15
Columns C00
C01
C02
C03
C04
C05
C06
C07
C08
C09
C10
C11
C12
C13
C14
C15
Ro
w
s
R0
T
AB
F1
8
F6
F9
F10
F12
P
AUSE
BACKSP
ACE
AR
WR
LSHIFT
NL
N8
Fn
END
R1
CAPS
LOCK
F2
9
3
F5
F1
1
0
=/+
AR
WDN
AR
WL
LCTRL
NL
N9
N*
Fn
P
AGE
DOWN
HOME
R2
1
F3
I
4
6
F8
O
]/}
AR
WUP
DELETE
RSHIFT
NL
N5
N6
Fn
P
AGE
UP
SYSRQ
R3
S
E
,/<
F
V
N
./>
\/|
'/"
R
WIN
//?
NL
N.
N/
R4
Z
RAL
T
D
SP
ACE
C
B
H
APPLICA
TION
R5
L
WIN
A
W
K
R
G
Y
ENTER
;/:
NL
N2
N+
R6
Q
2
U
5
T
7
L
[/{
P
RCTRL
NL
N4
N7
N3
N-
R7
FUNCTION
ESC
LAL
T
X
M
F4
F7
J
SCROL
LOCK
`/~
INSER
T
-/_
NL
N0
N1
Fn
NUM
LOCK
PRINT
SCREEN
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