VK202-25 Matrix Orbital, VK202-25 Datasheet - Page 26

VFD ALPHA/NUM DISPL 20X2 SER/I2C

VK202-25

Manufacturer Part Number
VK202-25
Description
VFD ALPHA/NUM DISPL 20X2 SER/I2C
Manufacturer
Matrix Orbital
Series
VK202-25r
Datasheet

Specifications of VK202-25

Outline L X W X H
116.00mm x 37.00mm x 29.48mm
Viewing Area
89.75mm L x 11.50mm W
Display Format
20 x 2
Display Type
Character
Format
5 x 7 Dots
Character Size
4.70mm H x 2.40mm W
Interface
Serial
Operating Temperature
-20°C ~ 70°C
Product
Character Display Modules
Character Count X Line
20 x 2
Module Size (w X H X T)
116 mm x 37 mm x 29.48 mm
Operating Temperature Range
- 20 C to + 70 C
Dot Format
5 x 7
Viewing Area (w X H)
89.75 mm x 11.5 mm
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Supply
-
Number Of Dots
-
Lead Free Status / Rohs Status
 Details
Other names
635-1020
7. Appendix: Command Summary
7.1 General
The operation of the VK202-25 is controlled by a simple and consistent command set. Commands control
This chapter includes summary tables of all commands. Individual commands are discussed in detail in
Chapters 3 to 5 in the same sequence as in the following tables.
7.2 Issuing Commands
Commands are issued to the VK202-25 by the controller. In a test setup, commands can be issued to the
VK202-25 by means of a BASIC program, using the chr$( ) function. In the tables below, we've shown
commands in hex, ASCII and decimal form. All commands begin with the prefix character 0xFE (254
decimal). These commands are issued on the serial communications link (I
defined baud rate.
For example (using BASIC in a test setup), you could issue the command to clear the screen on the VK202-
25 by including the line:
in your BASIC program. Or with C you could (using Zcomm serial library)
7.3 On Numbers
Like all computerized devices, the VK202-25 operates with commands and values in the form of binary
numbers. These binary numbers are arranged in 8 digit (i.e. 8 bit) groups called bytes. The decimal value of
a byte may have any value from 0 to 255.
Bytes are usually specified in either decimal or hexadecimal (base 16) form for convenience, since binary
numbers are confusing to deal with directly. Hexadecimal (hex) numbers are particularly convenient
because exactly two hexadecimal digits make up one byte, each hex digit representing 4 binary digits (4
bits) as shown here:
VK202-25 rev. 05
text display
graphics display
keypad interface
miscellaneous operating parameters
PRINT#1,chr$(254);chr$(88)
ZComm1->WriteCommByte(0xfe);
ZComm1->WriteCommByte('X');
Binary
0000
0001
0010
0011
0100
0101
0110
0111
Hex
0
1
2
3
4
5
6
7
Decimal
0
1
2
3
4
5
6
7
26
Binary
1000
1001
1010
1011
1100
1101
1110
1111
Hex
A
B
C
D
E
8
9
F
2
C or RS-232) at the currently
Decimal
10
11
12
13
14
15
8
9

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