Issue with 30-pin FPC interface for TFT EVEx

[TFTLCDCyg]

According to the CFA10098 breakout board datasheet, the FPC-30 ribbon cable connector has these lines for GND, 1, 4, 7, 9, 11, 13, 15, 17, 19, 24, 27, 30.
If I want to interface an FPC30 adapter to a 30-pin header with a 2x15 arrangement and 2.54 mm spacing, is it necessary to connect all those lines to ground?

Can the backlight power lines (BLPWR) be powered with 5V or only 3.3V is enough?

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[CF Kelsey]

Connecting all the pins to ground is going to give you the best performance as many of them separate data lines.

The backlight power will depend on the EVE module you're using. Some of them support both 3.3v and 5v, some require either 3.3v or 5v.

 

[TFTLCDCyg]

THX.

Could I then in theory connect a CFA240320E0-024SC display directly to a teensy 4.1 (3.3V logic) with the appropriate 30-pin FPC adapter without using the CFA10098 board?

 

[CF Kelsey]

The CFA10098 schematic is open source and available here: https://www.crystalfontz.com/products/document/4136/CFA10098Datasheet.pdf

If you're able to provide the necessary functionality offered by the CFA10098, then you can certainly connect the CFA240320E0-024SC without using a CFA10098.