1
Getting started
1.1
Features
•
2.8 "(240x320 pixel) TFT SPI LCD with resistive touch managed by an SPI touch screen controller available
on the board
•
PCB header connector interfacing with SPC5 MCU discovery boards
•
3.3V LDO voltage regulator for I/O signals
•
53 mm x 87 mm
•
WEEE and RoHS compliant
1.2
Hardware overview
1.2.1
Display control circuit
The display control circuit is managed by an ILI9341 controller. It is a 262, 144-color single-chip SOC driver used
for a TFT liquid crystal display with a resolution of 240RGBx320 dots, 172,800 bytes GRAM for graphic display
data, and power supply circuit.
The ILI9341 supports different communication protocols such as parallel communication at 8-bit, 9-bit, 16-bit,
18-bit, and SPI communication via three or four wires. It also supports display at 65K, 262K RGB color, display
rotation and scroll view.
In the
evaluation board, the communication between the ILI9341 and the external
microcontroller is managed via 4-wire SPI communication. Moreover, the ILI9341 controller is configured to work
in 16-bit (RGB565) mode in order to display up to 65K colors per pixel.
Figure 3.
SPI communication protocol implemented by ILI9341
CSX can be "H" between
command/command and parameter/command
During CSX = "H", SCL and SDA are invalid
As we can see from the above image, only when the CSX (chip select) is low the communication is enabled and,
depending on the value of D/CX data control pin, the data sent by SDA are interpreted as commands or as data:
when D/CX is high, the SDA data are interpreted by the controller as commands, whereas when it is low, they are
interpreted as data.
UM2939
Getting started
UM2939
-
Rev 1
page 3/28
