Graphical VFD Customer Display Interface

Host/Retail Display Command Interface

The Graphical VFD Customer Display accepts two types of data: display data and command data. If a byte received from the host is any character between 0x20 to 0xFF or a double byte character code, it is processed as a character and will be displayed on the Graphical VFD Customer Display. If the following characters are received, the subsequent byte(s) is processed as a command:

•Back Space (0x08)

•Horizontal Tab (0x09)

•Line Feed (0x0A)

•Home Position (0x0B)

•Display Clear (0x0C)

•Carriage Return (0x0D)

•ESC (0x1B)

•Unit Separator (0x1F)

If the subsequent byte is an invalid command, it will be ignored. Note that each command consists of at least two bytes. The first byte (0x1B) or (0x1F) is a command identifier indicating the next byte(s) is a command byte. The command byte may be followed by parameter or data bytes depending on the command.