Matrix-orbital GLK12232-25-FGW Manual do Utilizador descarregar pdf (Página 13)

WARNINGS

• Do not apply any power with reversed polarization.

• Do not apply any voltage other than the speciﬁed voltage

2.2 Keypad Interface Connector

The GLK12232-25 provides a Keypad Interface Connector which allows for up to a four by four matrix

style keypad to be directly connected to the display module. Key presses are generated when a short is

detected between a row and a column. When a key press is generated a character, which is associated with

the particular key press, is automatically sent on the Tx communication line. If the display module is running

in I

C mode, the “Auto Transmit Keypress” function may be turned off, to allow the key presses to remain

in the buffer so that they may be polled. The character that is associated with each key press may also be

altered using the “Assign Key Codes” command, for more detailed information see the Keypad Section, on

page 35.

Figure 13: Keypad Interface Connector

Matrix Orbital GLK12232-25 8

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Matrix-orbital GLK12232-25-FGW Manual do Utilizador Página 13