Displaytech Ltd. 2.8 inch LCD

The LCD of the display module is from Displaytech Ltd. and the used model is SDT028ATFT. The specifications for the display is listed in Table 1.

The display driver (ILI9341) offers a parallel and a serial interfaces, but for compatibilty between the different Xplained boards and standardization on the headers, only the SPI interface is routed. The default communication with the display is 8-bit SPI and the change between command and data (CMD/DATA) is done with a separate IO pin. The board can be reconfigured to use SPI in 9-bit mode. In this mode the 9th bit will be used to control if a command or data is transferred and hence the extra IO line will not be needed. To reconfigure this, you it is necessary to alter the display configuration by moving some resistors. Look at the schematics for more information.

For a complete set of commands and settings for controlling the display, refer to the datasheet of the display controller. Atmel provides a driver, code examples and graphics libraries in ASF (Atmel Software Framework).

Table 1. LCD Specification
Item Specification Unit
LCD mode Transmissive -
Resolution 240(RGB) Line
320 Line
Diagonal Size 2.8 Inch
Overall Size 50.00 mm
69.20 mm
Active area 43.2 mm
57.60 mm
Driver IC ILI9341 -
Interface type Serial, parallel and RGB -
Colours 262K -
Note: The SD Card interface share the same SPI lines with the LCD except for the Chip Select, so it is not possible to communicate with both at the same time.