Matrix-orbital GLK24064-25 Legacy Manual do Utilizador descarregar pdf (Página 16)

Power/Data Connector

Pin 2 Rx \ SCL (I

C clock)

Pin 3 Tx \ SDA (I

C data)

Pin 2 Tx \ SDA (I

C data)

Pin 3 Rx \ SCL (I

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

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

C mode you must

ﬁrst removethe zero ohm resistors from the 232 jumpers and then solder the resistors on to the I2C jumpers.

The display will now be in I

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

C jumpers and solder them to the TTL jumpers.

Figure 19: Protocol Select Jumpers

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