Need datasheet for LCD Display (Xinli PN TCXD022IBLON-5) used on X-NUCLEO-GFX01M2 AZ1 eval board (MB1642)

[KMurp.290]

Hello - We are developing a TouchGFX project using a very similar display to that used on the X-NUCLEO-GFX01M2 AZ1 eval (board #MB1642). According to the ST BOM (attached), the LCD is Xinli PN TCXD022IBLON-5. Unfortunately, I can't find a datasheet anywhere online and I need it to figure out particular signals in our wiring. ST must have a copy of that document for internal development of the hardware and software on X-NUCLEO-GFX01M2 AZ1 (MB1642). Please help. Thank you.

[Tesla DeLorean]

Not saying it wouldn't be better to have the LCD docs, but they might be Commercial/NDA so not directly redistributable, you'll likely need to source them directly from XINLI if you are sourcing these screens from them yourself.

The interface specifics should be exposed in the schematics, the mechanicals via the connectors and gerbers, and the pins/software side by the BSP driver code.

[Tesla DeLorean]

TL;DR;

The schematics do in fact have all the pins identified, by name, as the author dropped a symbol for what he/she was wiring against next to the header they were wiring too.

 TCXD022IBLON-5 XINLI FPC-TCXD022-5-V1 2.2" LCD INTERFACE ST7789V
 
 1 LED_K4 (BACKLIGHT CATHODE - 24.9R TO GND)
 2 IM0 INTERFACE MODE, LOW (SPI - 4 LINE 8-BIT)
 3 IM1 HIGH
 4 IM2 HIGH
 5 IM3 HIGH
 6 RESET (*NOT* NRESET, PULLED LOW, 10K TO GND)
 7 HSYNC
 8 VSYNC
 9 DOTCLK
10 ENABLE
11 DB17
12 DB16
13 DB15
14 DB14
15 DB13
16 DB12
17 DB11
18 DB10
19 DB9
20 DB8
21 DB7
22 DB6
23 DB5
24 DB4
25 DB3
26 DB2
27 DB1
28 DB0
29 SDO (MISO)
30 SDI (MOSI)
31 RD
32 RS/SCL (SCK)
33 WR (DCX) DATA/COMMAND
34 CS (NCS) CHIP SELECT
35 FMARK (TE) FLY-BACK / TEARING EFFECT
36 VCC (3.3V)
37 GND (GND)
38 LED_A (BACKLIGHT ANODE + TO 3.3V)
39 LED_K1 (BACKLIGHT CATHODE - 24.9R TO GND)
40 LED_K2
41 LED_K3
42 -NC-
43 TOUCH INTERRUPT
44 TOUCH I2C SCL
45 TOUCH I2C SDA
 
 25-MAY-2022 [e-mail]

[KMurp.290]

Great - thank you!

[KMurp.290]

Thanks for trying to help but the interface specifics in the schematics are insufficient. For example the schematic just shows 5 pins from the display going directly to 3.3V with no descriptions. I don't know which of those 5 pins represent power, control, etc and therefore can't leverage this design.

[Tesla DeLorean]

Not clear to me how you're going to leverage the design if you're not buying the screen from a vendor who presumably has access to the documents you need?

http://www.zxl-lcd.com/en/index.asp

http://www.lcdwiki.com/res/MSP2402/ILI9341_Datasheet.pdf

The screen is the DT022CTFT, it's marked on the cable assembly

https://www.mouser.com/datasheet/2/1015/DT022CTFT-Displaytech-Spec-1649629.pdf

[KMurp.290]

Thank you but...

1. The screen is TCXD022IBLON-5, not DT022CTFT. Ref both the cable assembly printing and BOM for MB1642.
2. The chipset for the screen is ST7789V, not ILI9341.
3. I want to use a different display, but one also based on the ST7789V controller. The two displays should connect the same signals but I can't tell how to wire it into the eval board without knowing the functions of the individual pins.