We recommend the following connectors for use with the DT024DTFT LCD:

SEA8058-45 - purchase here through Mouser

Hirose FH33-45S-0.5SH(99)  - purchase here through Digi-Key

Is it possible for DT024CTFT to perform "Write Display Brightness"?

Backlight is controlled by pins "A" and "K", pins 40 & 41, not through the ILI9341.

You have different ways to control the backlight:

1) No control over brightness, via a resistor hard wired.

2) A PWM signal generated by your micro, or through a light sensor.

Please refer to the CAT4139 for controlling backlight.

Our DT022CTFT uses the same LCD glass (240x320 resolution, same active area, etc.) but uses a specially slim designed backlight that fits in a 1U rack.

Is the driver IC ILI9341V built into the modules?
Yes, the ILI9341V is a COG IC connected to the display.

Is the backlight built into DT022BTFT and DT022CTFT?
Yes, the backlight is built into the display module. It is directly behind the LCD glass.

You can activate the 16-bit RGB Mode with 8-bit serial communication by tying the IM[3:0] pins to VDD.

You'll use DB[17:3], DB[11:1] for your 5-6-5 data (D[17:13] Red, D[11:6] Green, D[5:1] Blue). The unused D0 & D12 pins must be tied to ground.

The remaining bits required to set up the RGB interface (DPI, RCM) can be accessed via SPI  through the following connections to your microcontroller:

           Display                       Microcontroller

           SDO                            SDI (MISO)

           SDI (SDA)                   SDO (MOSI)

           RS/SCL                       SCK

           D/CX                           D/CX

           DE                               GPIO (or VDD/VSS if not used)

The unused RD pin should be fixed to VDD or VSS.