Specifications

Programmers Guide TH230/TH230+
200
User defined character sets
User defined character could be loaded in RAM (default) or in flash-memory (GS “) by the
sequence ESC &. It is possible to define one page (font A and font B) from the character
code 20H to the character code FFH (16x24). Depend from the storage (RAM or flash)
characters are available or not after power off.
The flash-memory works like a backup medium for the RAM. If a font defined in flash and
not in RAM, the RAM will be update. The user defined character will be read only from the
RAM. GS “ define the storage destination of user characters but it is read only from the
RAM. If flash chosen as storage destination but the character is in RAM already defined,
the RAM character will be overwritten with the flash character. On the other hand, a
definition in RAM can’t overwrite a definition in flash.