DD-DB1-AV204A Matrix Orbital, DD-DB1-AV204A Datasheet - Page 23

• Manufacturer Part Number: DD-DB1-AV204A
• Description: Display Modules & Development Tools DevDevil Dev Board 20x4 VFD Black Bg
• Manufacturer: Matrix Orbital
• Series: Dev Devilr

Specifications of DD-DB1-AV204A

• Main Purpose: Displays, VFD
• Embedded: Yes, ASIC
• Utilized Ic / Part: AL204A
• Primary Attributes: 20 x 4 Display, Yellow/Green Text Grey Background
• Secondary Attributes: GUI, mini USB
• Lead Free Status / Rohs Status: Details

3. Special Characters
Creates a custom character. Each character is divided into 8 rows of 5 pixels, each data byte represents one row. Each
byte is padded by three zero bits followed by five bits representing each pixel state. A one represents an on condition
while a zero is off. Characters are lost when a new memory bank is loaded, unless they are saved.
ID
Data
Provides access to all memory banks to create and save custom characters, graph bars, and large digits. Any new
characters saved will overwrite the old, so care should be taken when writing to any bar or digit memory bank. Bank
structure is shown below.
Bank
ID
Data
3.1.Create a Custom
3.2.Save Custom
1 byte, character ID 0-7
8 bytes, character pixel data as shown below
Character
Characters
1 byte, memory bank ID (0-4)
1 byte, character ID (0-7)
8 bytes, character pixel data
0
Start-up Characters
Dec
Hex
Dec
Hex
ASCII
254 193
FE C1
254 78
Data1
Data2
Data3
Data4
Data5
Data6
Data7
Data8
FE 4E
1
■
Horizontal Bars
N
Bank ID Data
Bank ID Data
ID Data
ID Data
ID Data
000 p1 p2 p3 p4 p5 00001000
000 p1 p2 p3 p4 p5 00010100
000 p1 p2 p3 p4 p5 00001000
000 p1 p2 p3 p4 p5
000 p1 p2 p3 p4 p5 00000100
000 p1 p2 p3 p4 p5 00000100
000 p1 p2 p3 p4 p5
000 p1 p2 p3 p4 p5 00000000
2
21
Vertical Bars
00000011
00000011
3
Medium Digits
20
8
8
3
4
4
3
0
4
Large Digits