Matrix Orbital GLK12232-25-SM - Manual (Page 16)

Figure 15: Manual Override Jumper
Table 2: Default Values
Contrast 128
Backlight 255
Baud Rate 19.2 kbps
I 2 C Slave Address 0x50
Data Lock 0x00
RS232AutoTransmitData True
NOTE The display module will revert back to the old settings once turned off, unless the
settings are saved.
2.6 Filesystem Lock Jumper
The Filesystem Lock Jumper allows you to lock the filesystem on the GLK12232-25-SM so that no
fonts or bitmaps can be either written or deleted from the on board memory. This feature is useful in order
to protect data integrity of production units, if protection of other settings is required see Section 13
To lock the filesystem, solder a zero ohm resistor or use a solder jumper pictured in Figure 16 below.
Matrix Orbital GLK12232-25-SM 11