Table 7: Keypad Layout
Columns
1
2
3
4
5
6
1
A
B
C
D
E
F
Rows
2
G
H
I
J
K
L
3
M
N
O
P
Q
R
4
S
T
U
V
W
X
NOTE
The keypad connector must be wired with columns on one side and rows on the
other side of the centre of the connector. If the keypad isn’t wired this way the user will
need to make an adapter or rewire the connector to meet this requirement.
3.3 Keypad Commands
Some commands, marked with an "R", may be "Remembered" to set new defaults that will be in effect
each time the unit is powered on.
3.3.1 Auto Repeat Mode On (254 126[mode])(R)
[mode]=0x00 gives Resend Key Code mode
[mode]=0x01 gives Key Down / Key Up Code mode
Two modes of auto repeat are available and are set via the same command.
1.
Resend Key Mode:
This mode is similar to the action of a keyboard on a PC. In this mode, when a
key is held down, the key code is transmitted, immediately followed by a 1/2 second delay.
2.
Key down / Key up codes:
This code may be used when the typematic parameters of the “Resend key
code” mode are unacceptable or if the unit is being operated in polled mode. The host system detects
the press of a key and stimulates an auto repeat inside the host system until the key release is detected.
In this mode, when a key is held down, the key code is transmitted immediately and no other codes will be
sent until the key is released. On the release of the key, the key release code transmitted will be a value equal
to the key down code plus 20 hex. For example, if the key code associated with key “P”(0x50) is pressed,
the release code is “p”(0x70).
Matrix Orbital
LK204-24-USB
17
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