Data Sheet

a-Si TFT LCD Single Chip Driver
240RGBx320 Resolution and 262K color
ILI9341
The information contained herein is the exclusive property of ILI Technology Corp. and shall not be distributed,
reproduced, or disclosed in whole or in part without prior written permission of ILI Technology Corp.
Page 24 of 233
6. Block Function Description
MCU System Interface
ILI9341 provides four kinds of MCU system interface with 8080- /8080- series parallel interface and
3-/4-line serial interface. The selection of the given interfaces are done by external IM [3:0] pins and shown
as below:
Pins in use
IM3 IM2 IM1 IM0 MCU-Interface Mode
Register/Content GRAM
0 0 0 0 8080 MCU 8-bit bus interface D[7:0] D[7:0],WRX,RDX,CSX,D/CX
0 0 0 1
8080 MCU 16-bit bus interface
D[7:0] D[15:0],WRX,RDX,CSX,D/CX
0 0 1 0
8080 MCU 9-bit bus interface
D[7:0] D[8:0],WRX,RDX,CSX,D/CX
0 0 1 1
8080 MCU 18-bit bus interface
D[7:0] D[17:0],WRX,RDX,CSX,D/CX
0 1 0 1 3-wire 9-bit data serial interface
SCL,SDA,CSX
0 1 1 0 4-wire 8-bit data serial interface
SCL,SDA,D/CX,CSX
1 0 0 0
8080 MCU 16-bit bus interface
D[8:1]
D[17:10],D[8:1],WRX,RDX,CSX,D/CX
1 0 0 1
8080 MCU 8-bit bus interface
D[17:10]
D[17:10],WRX,RDX,CSX,D/CX
1 0 1 0
8080 MCU 18-bit bus interface
D[8:1]
D[17:0],WRX,RDX,CSX,D/CX
1 0 1 1
8080 MCU 9-bit bus interface
D[17:10]
D[17:9],WRX,RDX,CSX,D/CX
1 1 0 1 3-wire 9-bit data serial interface
SCL,SDI,SDO, CSX
1 1 1 0 4-wire 8-bit data serial interface
SCL,SDI,D/CX,SDO, CSX
In 8080- /8080- series parallel interface, the registers are accessed by the D[17:0] data pins.
8080- Series 8080- Series
CSX D/CX RDX WRX CSX D/CX RDX WRX
Operation
“L” “L” “H” “L” “L” “H” Write command
“L” “H” “H” “L” “H” “H” Read parameter
“L” “H” “H” “L” “H” “H” Write parameter
Parallel RGB Interface
ILI9341 also supports the RGB interface for displaying a moving picture. When the RGB interface is selected,
display operation is synchronized with externally signals, VSYNC, HSYNC, and DOTCLK and input display
data is written in synchronization with these signals according to the polarity of enable signal (DE).
Graphic RAM (GRAM)
GRAM is a graphic RAM to store display data. GRAM size is 172,800 bytes with 18 bits per pixel for a
maximum 240(RGB) x320 dot graphic display.
Grayscale Voltage Generating Circuit
Grayscale voltage generating circuit generates a liquid crystal drive voltage, which corresponds to grayscale
level set in the gamma correction register. ILI9341 can display maximum 262,144 colors.