VK204-25-422-E Matrix Orbital, VK204-25-422-E Datasheet - Page 15

• Manufacturer Part Number: VK204-25-422-E
• Description: VF CHARACTER DISPLAY 20X4 RS422
• Manufacturer: Matrix Orbital
• Series: LK204-25r

Specifications of VK204-25-422-E

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Power Through DB9 Jumper
In order to provide power through pin 9 of the DB-9 Connector you must connect the Power Through
DB-9 Jumper labelled R17, as illustrated below. This connection can be made using a zero ohm resistor,
recommended size 0603, or a solder bridge. The LVK204-25 allows all voltage models to use the power
through DB-9 option, see the electrical specifications in Table 40 for voltage requirements.
Power Through DB9 Jumper
Protocol Select Jumpers
The Protocol Select Jumpers provide the means necessary to toggle the standard LVK204-25 model
between RS-232, TTL and I²C protocols. As a default, the jumpers are set to RS-232 mode with solder
jumps on the 232 jumpers. In order to place the display module in I²C mode you must first remove the
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solder jumps from the 232 jumpers and then place them on the I
C jumpers. The display will now be in
I²C mode and have a default slave address of 80, 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 I²C jumpers and
solder them to the TTL jumpers. Protocol changes are only supported on the standard unit.
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