Matrix Orbital GLK24064-25 Legacy - Manual (Page 13)

Figure 14: Manual Override Jumper
Table 1: Default Values
Contrast 128
Backlight 255
Baud Rate 19.2 kbps
I 2 C Slave Address 0x50
Data Lock False
RS232AutoTransmitData True
NOTE The display module will revert back to the old settings once turned off, unless the
settings are saved.
2.3 Keypad Interface Connector
The GLK24064-25 provides a Keypad Interface Connector which allows for up to a five by five 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
2 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 33.
Matrix Orbital GLK24064-25 8