LK404-25-E Matrix Orbital, LK404-25-E Datasheet - Page 14

• Manufacturer Part Number: LK404-25-E
• Description: LCD Character Display Modules 40x4 Grn/Yel Ext Temp
• Manufacturer: Matrix Orbital

Specifications of LK404-25-E

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

2.7 Keypad Interface Connector
keypad to be directly connected to the display module. Key presses are generated when a short is detected
between a row and a column. When a key press is generated a character, which is associated with the
particular key press, is automatically sent on the Tx communication line. If the display module is running
in I
in the buffer so that they may be polled. The character that is associated with each key press may also be
altered using the “Assign Key Codes” command, for more detailed information see the Keypad Section, on
page 32.
Matrix Orbital
2. Place a Jumper on the Manual Override pins.
3. Power up the display module.
4. The display module is now set to its default values listed below in
5. Edit and save settings.
2
The LK404-25 provides a Keypad Interface Connector which allows for up to a five by five matrix style
C mode, the “Auto Transmit Keypress” function may be turned off, to allow the key presses to remain
NOTE The display module will revert back to the old settings once turned off, unless the
settings are saved.
Brightness
Baud Rate
I
Data Lock
RS232AutoTransmitData
2
Figure 17: Manual Override Jumper
C Slave Address
Table 2: Default Values
LK404-25
19.2 kbps
False
0x50
True
255
table 2
.
10