4.1.4
USB Communication
The LK204-25-USB is a USB device that offers identical communication protocol as the serial comport.
capable of communicating via a USB interface. The USB communications are identical to the serial commu-
nications. Communication is via a virtual com port, which is created in the operating system by the drivers
necessary to install the USB display. The LK204-25-USB communicating via USB is capable of baud rates
of 19,200 bps to 115,200 bps. Other baud rates are subject to the limitation of the virtual com port driver. For
further information regarding supported operating systems, and driver limitations please contact technical
support.
4.2
Changing the I
2
C Slave Address
Syntax
Hexadecimal
0xFE 0x33 [adr]
Decimal
254 51 [adr]
ASCII
254 “3” [adr]
Parameters
Parameter
Length
Description
adr
1
The new I
2
C write address (0x00 -
0xFF).
Description
This command sets the I
2
C write address of the module between 0x00
and 0xFF. The I
2
C write address must be an even number and the read
address is automatically set to one higher. For example if the I
2
C write
address is set to 0x50, then the read address is 0x51.
NOTE
The change in address is immediate.
Remembered
Always
Default
0x50
4.3
Changing the Baud Rate
Syntax
Hexadecimal
0xFE 0x39 [speed]
Decimal
254 57 [speed]
ASCII
254 “9” [speed]
Parameters
Parameter
Length
Description
speed
1
Hex value corresponding to a baud
rate.
Matrix Orbital
LK204-25-USB
17
