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heyo
Associate III
May 25, 2023
Solved

DE mode and HSD/VSD mode

  • May 25, 2023
  • 3 replies
  • 6565 views

Hello, I'm using STM32H743ZIT6 and have question about DE mode and HSD/VSD mode. In my LCD datasheet is MODE pin with which I can select mode:
_legacyfs_online_stmicro_images_0693W00000bkrKTQAY.pngWhat are difference between them? If I use DE mode I do not need to generate VSYNC and HSYNC?

This topic has been closed for replies.
Best answer by KDJEM.1

Hello @heyo​ ,

As ready mentioned, generally, both of interfaces DE and HSD/VSD require HSYNC, VSYNC and a clocking signal.

But, by checking this datasheet and according the DE mode table this LCD require a vertical and horizontal sync signal.

I think this discussion can help you.

When your question is answered, please close this topic by choosing Select as Best. This will help other users find that answer faster.

Thank you

Kaouthar

3 replies

KDJEM.1
ST Technical Moderator
May 31, 2023

Hello @heyo​ ,

Could you please refer to the LCD datasheet to determine the difference between these modes.

For some LCD, the difference between the DE and HV interfaces is that HV mode does not have the added data enable signal. The DE signal is used as an additional verification step to indicate valid data being transferred.

Generally, both of interfaces will require HSYNC, VSYNC and a clocking signal.

When your question is answered, please close this topic by choosing Select as Best. This will help other users find that answer faster.

Thank you

Kaouthar

To give better visibility on the answered topics, please click on "Best answer" on the reply which solved your issue or answered your question.
heyo
heyoAuthor
Associate III
June 2, 2023
KDJEM.1
KDJEM.1Best answer
ST Technical Moderator
June 8, 2023

Hello @heyo​ ,

As ready mentioned, generally, both of interfaces DE and HSD/VSD require HSYNC, VSYNC and a clocking signal.

But, by checking this datasheet and according the DE mode table this LCD require a vertical and horizontal sync signal.

I think this discussion can help you.

When your question is answered, please close this topic by choosing Select as Best. This will help other users find that answer faster.

Thank you

Kaouthar

To give better visibility on the answered topics, please click on "Best answer" on the reply which solved your issue or answered your question.