3

EA KIT240-7

EXTERNALKEYBOARD

A keyboard (anything from individual keys to a 10x6 matrix keyboard) can

be connected at the plug-in connection. The connected keys are

debounced by means of software. Please note that it is only possible to

connect an external keyboard to versions without an integrated touch

panel.

Each key is switched between an output and an input. Each input has a

100k

Ω pullup. Up to 6 keys can be connected at each output.

Transmitting the keystrokes

At each keystroke, the associated key

number (1..60) is transmitted. The release

of the key is not transmitted. If the release of

the key is to be transmitted as well, this can

be done by defining touch macro no. 0. The

automatic

keyboard

scan

can

be

deactivated by means of the command "ESC T A 0".

The key number can be determined as follows: Key number = (output -

1) * 10 +input (output: a number between 1 and 10; input: a number

between 1 and 6).

Note: If the handshake line (e.g. CTS) does not permit transmission,

keystrokes can be lost.

Versions EA KIT240-7CTP and -7LEDTP are supplied with an integrated touch panel with 60 fields.

The graphics kit offers convenient commands supporting this touch panel. It is possible, for example,

to group a number of touch fields to form a single large key and then draw and label the key. You can

also assign a record code (1..255) to the key you have defined. If a return code of 0 is assigned, the

key is disabled and has no effect when it is pressed.

When the touch keys are touched, they can be automatically inverted and a tone can sound, indicating

they have been touched. At the same time, the defined return code of the key is transmitted via the

serial interface, or an internal touch macro with the number of the return code is started.

Example:

Definition of a key from field 13 to 25 with the return code 65=´A´ and the text "STOP". Note: Before

individual keys are defined, all fields should be disabled by means of

"ESC T R".

J4 matrix keyboard

connection

Pin

Symbol

Function

1

IN 1

Input line 1

2

IN 2

Input line 2

3

IN 3

Input line 3

4

IN 4

Input line 4

5

IN 5

Input line 5

6

IN 6

Input line 6

7

OUT 10

Output column 10

8

OUT 9

Output column 9

9

OUT 8

Output column 8

10

OUT 7

Output column 7

11

OUT 6

Output column 6

12

OUT 5

Output column 5

13

OUT 4

Output column 4

14

OUT 3

Output column 3

15

OUT 2

Output column 2

16

OUT 1

Output column 1

Application example

Example

Codes to be output

Note

For

com piler

#TH 13, 25, ´A´, 2, "STOP"

The end code 0 is not

s pecified here

As ASCII

ESC

T

H

..

A

.

S

T

OP

.

The dots ´.´ s tand for ASCII

characters that are not to be

dis played

In hex

$1B $54 $48 $0D $19 $41 $02 $53 $54 $4F $50 $00

In decim al

27

84

72

13

25

65

2

83

84

79

80

0