How to use this display?

[windorey]

Hello, I am unsure how to use this display, as the RD pin is missing. I have an ESP32 board and this display:

Can I be given an example, as well as the pinout for it to see if it works? Thanks.

• This question is for a friend, I'm posting on his behalf.

[tobozo]

yes it is supported, it can do 16 bits parallel data mode, only S2 or a S3 dev board have enough pins for this mode though.

it can probably do other data modes (e.g. SPI3) but you'll have to check the documentation to find that out, selecting a different mode may require a physical or software configuration depending on the model.

See this folder with a few examples,

[windorey]

It doesn't make sense. There is a display CS, an SD CS and a flash CS. There is no such thing as a read pin or similar on the display.
Here is a pinout diagram, maybe you can make some sense of it?

[windorey]

The datasheet:
MAR3513-User Manua.pdf

[windorey]

Ok, I got it fixed. But now there is a different issue. I will open a new discussion on it .

[tobozo]

glad you made sense of it

[lovyan03]

If a panel with a 16-bit data bus is operated with an 8-bit connection, it will not operate properly. Keep in mind that it will not be drawn in at least the correct color.

[TangerineDreamer]

i have a 7inch SSD1963 with esp32,i only use one range of DB0...DB7,don't use the rest of DB's
maybe you can look at this user setup #50 at :
https://github.com/Bodmer/TFT_eSPI/blob/master/User_Setups/Setup50_SSD1963_Parallel.h

[lovyan03]

Since SSD1963 can be changed by command to operate in 8-bit or 16-bit mode, it can be used in 8-bit mode.
Note that the board targeted in this discussion does not; it must be wired for all 16 bits to be drawn in the correct color.