Matrix Orbital LK202-25 Legacy - Manual (Page 22)

LK202-25 rev 3 22
6.1.5 Backlight on (254 66 [minutes]) (R)
This command turns on the backlight for a time of [minutes] minutes. If [minutes] is zero (0), the
backlight will remain on indefinitely. Note: the factory default for backlight is on.
6.1.6 Backlight off (254 70) (R)
This command turns the backlight of the LK202-25 off.
6.1.7 Load startup screen (254 64 [40 characters])
This command sets and memorizes the startup screen that will appear each time the LK202-25 is turned
on. By default the screen shows:
Matrix Orbital
LK202-25
The 40 characters define the two 20 character rows of the screen. They may be any characters from the
character set shown in Figure 3-1.
Character 1 ---------------------------- Character 20
Character 21 --------------------------- Character 40
6.1.8 General purpose output off (254 86 [gpo #])
This command turns OFF any of the General Purpose Outputs (see section 2.2 for a description of the
GPOs). [gpo #] is 1 to 6. Note that OFF means that the output floats.
6.1.9 General purpose output on (254 87 [gpo #])
This command turns ON any of the General Purpose Outputs. [gpo #] is 1 to 6. ON means that the output
is pulled low (ground via 240 ohms).
6.1.10 Set I
2
C address 254 51 [address])
This command sets the I²C write address of the module. This value must be an even number and the read
address is one higher. For example if the I²C write address is set to 0x50, then the read address is 0x51.
The change in address is immediate. This address is 0x50 by default, and is reset temporarily back to that
value when the "Manual Over-ride" jumper is used on power up (see section 1.7).