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Can I connect chip with 1 data Lane MIPI to 2 data Lane MIPI display and how ?

MNapi
Senior III

I have not seen displays with 1 data Lane MIPI but they are always 2 data Lane MIPI

2.png

but some STM chips have only one 1 data Lane MIPI

Can it be somehow connected like grounding the remaining line.

1.png

1 ACCEPTED SOLUTION

Accepted Solutions
KDJEM.1
ST Employee

Hello @MNapi ,

 

Most of STM32MCUs have DSI with 2 data lanes including STM32L4S9 UFBGA144, WLCSP144, UFBGA169 packages.

KDJEM1_3-1724148098216.png

 

For certain STM32L4S9  packages (LQFP100 and LQFP144), have a DSI with only 1 data lane.

I think you can find displays with 1 data lane on market as the display used in 32L4R9IDISCOVERY board "1.2” 390x390 pixel AMOLED round display" which supports only 1 data lane.

KDJEM1_0-1724147619716.png

KDJEM1_1-1724147713736.png

 

Note that, in this case it is display limitation not STM32 MCU limitation because the STM32L4R9AII6 supports MIPI® DSI 2-lanes .

KDJEM1_2-1724147812078.png

If your display requires more lanes than your chip supports, you need to contact the display manufacturer to check if the display can be configured to work with fewer lanes.

I hope this answer your request.

Thank you.

Kaouthar

To give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.

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1 REPLY 1
KDJEM.1
ST Employee

Hello @MNapi ,

 

Most of STM32MCUs have DSI with 2 data lanes including STM32L4S9 UFBGA144, WLCSP144, UFBGA169 packages.

KDJEM1_3-1724148098216.png

 

For certain STM32L4S9  packages (LQFP100 and LQFP144), have a DSI with only 1 data lane.

I think you can find displays with 1 data lane on market as the display used in 32L4R9IDISCOVERY board "1.2” 390x390 pixel AMOLED round display" which supports only 1 data lane.

KDJEM1_0-1724147619716.png

KDJEM1_1-1724147713736.png

 

Note that, in this case it is display limitation not STM32 MCU limitation because the STM32L4R9AII6 supports MIPI® DSI 2-lanes .

KDJEM1_2-1724147812078.png

If your display requires more lanes than your chip supports, you need to contact the display manufacturer to check if the display can be configured to work with fewer lanes.

I hope this answer your request.

Thank you.

Kaouthar

To give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.