PK202-25 Matrix Orbital, PK202-25 Datasheet - Page 37

• Manufacturer Part Number: PK202-25
• Description: LCD Character Display Modules Black Background Yel/Grn Text
• Manufacturer: Matrix Orbital
• Series: PK202-25r

Specifications of PK202-25

• Character Count X Line: 20 x 2
• Module Size (w X H X T): 116 mm x 37 mm x 25.73 mm
• Background Color: Black
• Backlight Type: LED Yellow / Green
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8 Appendix: Command Summary
8.1 General
This chapter includes summary tables of all commands.
8.2 Issuing Commands
the display by means of a BASIC program, using the chr$( ) function. In the tables below, we’ve shown
commands in hex, ASCII and decimal form. All commands begin with the prefix character 0xFE (254
decimal). These commands are issued on the serial communications link (I
defined baud rate.
display by including the line;
In the BASIC program.
Matrix Orbital
The operation of the display is controlled by a simple and consistent command set. Commands control;
• Text display
• Graphics display
• Keypad interface
• Miscellaneous operating
• Parameters
Commands are issued to the display by the controller. In a test setup, commands can be issued to
For example (using BASIC in a test setup), the user could issue the command to clear the screen on the
Or, with C the user could (using Zcomm serial library)
Offset
(Bytes)
0
2
3
4
5
13
Offset
(Bytes)
2
1
1
1
8
1
Table 19: Search Return Packet
PK202-25
Description
0x232A - Preamble
0x8A - Packet is 10 bytes long, an-
other address will follow 0x0A -
Packet is 10 bytes long, this is the
last address
0x31 - 1-Wire Packet Type
Error Code (0x00 for success)
1-Wire Address
CRC8 - 0x00 means the last address
was valid
2
C or RS-232) at the currently
33