LK202-25-FW Matrix Orbital, LK202-25-FW Datasheet - Page 19

• Manufacturer Part Number: LK202-25-FW
• Description: LCD Character Display Modules Black Background White Text
• Manufacturer: Matrix Orbital
• Series: LK202-25r

Specifications of LK202-25-FW

• Character Count X Line: 20 x 2
• Module Size (w X H X T): 116 mm x 37 mm x 25.73 mm
• Fluid Type: STN
• Voltage Rating: 5 V
• Operating Temperature Range: 0 C to + 50 C
• 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 36.
Matrix Orbital
2
The LK202-25 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.
NOTE The Ground / +5V pin is toggled by the jumper to the right of the keypad connec-
tor. Jump 1 & 2 for +5V or 2 & 3 for GND.
Brightness
Baud Rate
I
Data Lock
RS232AutoTransmitData
Figure 21: Keypad Interface Connector
2
C Slave Address
Table 2: Default Values
LK202-25
19.2 kbps
False
0x50
True
255
15