This feature is used to write the display memory with the sequence of segment values for the predefined strings automatically by using the Direct Memory Access (DMA). This Automated Character Mapping (ACM) has the following modes: “Sequential Characters String Display” and “Scrolling of Characters String”. This application briefs about ACM Scrolling of Characters String.
To use this mode we need to configure any of the frame counters among the three independent frame counters FC0, FC1, and FC2 to create a time base.
In ACM, compared to manual character mapping, there is one restriction; The first character is always mapped to the COM0 line.