Matrix-orbital LK402-25 Bedienungsanleitung PDF herunterladen (Seite 15)

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 R54, as illustrated below. This connection can be made using a zero ohm resistor,

recommended size 0603, or a solder bridge. The LK402-25 allows all voltage models to use the power

through DB-9 option, see the electrical specifications in Table 42 for voltage requirements.

Power Through DB9 Jumper

Protocol Select Jumpers

The Protocol Select Jumpers provide the means necessary to toggle the LK402-25 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 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 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 I²C jumpers and solder them to the TTL

jumpers. Protocol tables are shown below where an `X` designates a connected jump while an ‘O’

signifies an open connection.

Table 8: RS232 Protocol Settings

RS232

TTL

Table 9: TTL Protocol Settings

RS232

TTL

Table 10: I

C Protocol Settings

RS232

TTL

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 42 43

Keine Kommentare

Matrix-orbital LK402-25 Bedienungsanleitung Seite 15