Matrix Orbital DD-DB1 LCD/VFD Dev Board - Manual (Page 24)

3.3.Load Custom
Characters
Dec
Hex 254 192
FE C0
Bank
Bank
Loads a bank of custom characters into memory for use. Must be issued before using a bank of characters. Alternatively,
an appropriate initialize command can be used.
Bank 1 byte, memory bank ID (0-4)
3.4.Save Startup Screen
Custom Characters
Dec
Hex
254 194
FE C2
ID Data
ID Data
Saves a custom character to memory for the start up screen or repeated use. Start up characters are displayed by
sending their ID to the screen.
ID 1 byte, character ID (0-7)
Data 8 bytes, character pixel data, see custom character example
3.5.Initialize Medium
Numbers
Dec
Hex
ASCII
254 109
FE 6D
m ■
Loads the medium number custom character bank into memory. Medium numbers must be initialized before use.
3.6.Place Medium
Numbers
Dec
Hex
ASCII
254 111
FE 6F
o ■
Row Column Digit
Row Column Digit
Row Column Digit
Places a single medium decimal digit of 2 row height and 1 column width on the display at the position specified.
Medium numbers must be initialized before being placed.
Row 1 byte, value between 1 and 20
Column 1 byte, value between 1 and 2 for 20x2 screen or 1 and 4 for 20x4 screen
Digit 1 byte, single decimal digit to display
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