6 protocol select jumpers – Matrix Orbital GLK24064-25 Legacy User Manual
Page 16
Power/Data Connector
=
[
Pin 2
Rx \ SCL (I
2
C clock)
Pin 3
Tx \ SDA (I
2
C data)
x
[
Pin 2
Tx \ SDA (I
2
C data)
Pin 3
Rx \ SCL (I
2
C clock)
Figure 18: Legacy Data Connector Jumpers
2.6
Protocol Select Jumpers
The Protocol Select Jumpers, pictured below in
figure 19
, provide the means necessary to toggle the
display module between RS-232, TTL and I
2
C protocols. As a default, the jumpers are set to RS-232 mode
with zero ohm resistors on the 232 jumpers. In order to place the display module in I
2
C mode you must
first remove the zero ohm resistors from the 232 jumpers and then solder the resistors on to the I2C jumpers.
The display will now be in I
2
C mode and have a default slave address of 0x50 unless it has been changed.
Similarly, in order to change the display to TTL mode, simply remove the zero ohm resistors from the 232
or I
2
C jumpers and solder them to the TTL jumpers.
Figure 19: Protocol Select Jumpers
Matrix Orbital
GLK24064-25
11