Controller Features

Common features of display controllers are summarized on this page. If a controller supports different hardware interfaces, and if these hardware interfaces support different features, they should show up as different controllers.

What the different columns mean:

• Controller Type (interface): the controller's name and what interface it uses.
• Write(x,y): yes if the controller supports pixel-wise write access
• Read(x,y): yes if the controller supports pixel-wise read access (for read-modify-write drawing)
• Clip: yes if it is possible to limit the drawing area to a certain rectangle
• Orient: yes if 90 degree rotation and mirroring along x and y axes is supported
• Sleep: yes if some sort of sleep mode is supported
• Geo: yes if drawing geometric forms is supported (we might need to refine this)
• Fonts: yes if drawing of characters is suported (we might need to refine this)

To add a table row, copy this block into the table and fill in the details (please keep the comments as they make it easier to read the source:

<tr>
  <td>Controller (Interface)</td> <!--- Controller (Interface) -->
  <td>Write (x,y)</td> <!--- Write (x,y) -->
  <td>Read (x,y)</td> <!--- Read (x,y) -->
  <td>Clip</td> <!--- Clip -->
  <td>Orient</td> <!--- Orient -->
  <td>Sleep</td> <!--- Sleep -->
  <td>Geo</td> <!--- Geo -->
  <td>Fonts</td> <!--- Fonts -->
</tr>

Controller Type (interface)	Write(x,y)	Read(x,y)	Clip	Orient	Sleep	Geo	Fonts
PCD8544 (SPI)	no	no	no	no	no	no	no
RA8845 (Parallel, SPI)	yes	yes	yes	no	yes	yes	ROM ext ROM CGRAM
RA8845 (I²C)	yes	yes	yes	no	no	yes	ROM ext ROM CGRAM
SSD1351 (Parallel)	yes	yes	yes	yes	yes	no	no
SSD1351 (SPI)	yes	no	yes	yes	yes	no	no