C communications – Matrix Orbital GLC24064 User Manual
Page 16
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2.2.3 I
2
C Communications
The display has I
2
C communications running at 100 Kbps and up to 127 units can exist on a single
communications line. The display I
2
C communication lines are the two middle pins of the power connector.
These are shared with RS-232 and must be turned on. The default I
2
C address is 0x50. The I
2
C data line
operates on 5 volts.
Figure 16: Power Connector
Table 6: Connector Pinout
Pin 4
Ground
Pin 3
SDA (I
2
C data)
Pin 2
SCL (I
2
C clock)
Pin 1
Vdc
The display does not work on I
2
C by default. The modification shown in the Figure below must be
carried out.
Figure 17: I
2
C
I
2
C communication runs at 100 Kbps and supports up to 127 units on a single communications line. The
I
2
C data line operates on 5V CMOS levels.
Matrix Orbital
GLC24064
12
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