LK204-7T-1U-USB-WB Matrix Orbital, LK204-7T-1U-USB-WB Datasheet - Page 21

• Manufacturer Part Number: LK204-7T-1U-USB-WB
• Description: DISPLAY
• Manufacturer: Matrix Orbital

Specifications of LK204-7T-1U-USB-WB

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 635-1054

3.2 The display module is not communicating.
3.3 The display module is communicating, however text cannot
4 Communications
4.1 Introduction
4.1.1 I
on a single I
pull up resistors, with a nominal value of 1K to 10K, are placed on the SCL and SDA communication lines
coming from pins two and three of the Data / Power Connector respectively. Data responses by the module
are automatically output via RS232, in case the host will be querying the module, it is necessary for the host
Matrix Orbital
• First, check the communication cable for continuity. If you don’t have an ohm meter, try using a
• Second, please ensure that the display module is set to communicate on the protocol that you are
• Third, ensure that the host system and display module are both communicating on the same baud rate.
• If you are communicating to the display via I
• Finally, you may reset the display to it’s default settings using the Manual Override Key, see Sec-
• A common cause may be that the contrast settings have been set to low. The solution to this problem
The commands listed in this chapter describe how to configure data flow on the LK204-7T-1U.
The LK204-7T-1U is capable of communicating at 100 KHz in I
different communication cable. If you are using a PC try using a different Com port.
using, by checking the Protocol Select Jumpers. To change the protocol used by the display module
see Section 2.5 on page 12.
The default baud rate for the display module is 19200 bps.
address. The default slave address for the display module is 0x50.
tion 2.7 on page 14.
is to adjust the contrast settings, the default setting that will work in most environments is 128
be displayed.
NOTE I
NOTE Optimal contrast settings may vary according to factors such as temperature, view-
ing angle and lighting conditions.
If you are unable to resolve any issue please contact Matrix Orbital. See 14.6 on page 62
for contact information.
2
C Communication Summary
2
C communication line. However, in order to communicate via I
2
C communication will always require pull up resistors.
LK204-7T-1U
2
C please ensure that the data is being sent to the correct
2
C mode, with 127 units addressable
2
C you must first ensure that
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