LK202-25-USB Matrix Orbital, LK202-25-USB Datasheet - Page 36

• Manufacturer Part Number: LK202-25-USB
• Description: LCD Character Display Modules Yel/Grn Background Black Text
• Manufacturer: Matrix Orbital

Specifications of LK202-25-USB

• 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

9 Keypad
9.1 Introduction
presses to be automatically transmitted via USB. The LK202-25-USB also allows for auto-repeating key
presses, and remapping of all keypad character codes.
not be damaged by reversing the connector. However, the keypad will generate a different ASCII character
mapping for each position. If the connector has fewer than 10 pins it should be centered on the display
Matrix Orbital
The LK202-25-USB supports up to a 25 key, matrix style, keypad and may be configured to allow key
The connector is not keyed so the keypad will probably plug in either of two ways. The display will
Description
Remembered
This command will perform a single transaction on the 1-wire bus in
this order:
The number of bits to be transmitted and read must be specified for this
command to be successful.
NOTE To determine what functions the device will respond to, consult the devices’ data
sheet.
No
1. Bus Reset.
2. Transmit data onto the bus.
3. Receive data from the bus.
Bit
7
6
5
4
3
2
1
0
Assume last received byte is a CRC8 and validate it
Add a CRC8 to the end of the transmitted data
Code
LK202-25-USB
0x00
0x01
0x02
0x03
Reset bus before transaction
1-Wire Error Codes
(0 for future compatibility)
(0 for future compatibility)
Unknown 1-Wire Command
1-Wire Flags
No devices on the bus
Fatal search error
Description
Description
Unused
Success
32