STM32F7 and STM32H7 HDMI implementation

[scott239955_stm1_stmicro_com]

Hello,

Please forgive me for what is probably a newbie question.  What is required to implement an HDMI interface with the STM32F7 or H7 MCU series?  Is a DSI-to-HDMI bridge always required?  What is the max. supported display resolution?

Thanks,

Scott

[STTwo-32]

Hello @scott239955_stm1_stmicro_com 

I suggest you to take a look at the HDMI-CEC chapter of the STM32H7 or STM32F7 that you are using.

Best Regards.

STTwo-32 

[Tesla DeLorean · Accepted solution]

HDMI-CEC is an entirely different thing, and not the question being asked.

Yes, you're likely to need a bridge, you can only use two-lanes, so basically limited to 800 Mbps - 1 Gbps

So perhaps resolutions of around 1024x600, 1280x800 or 1388x768, say 1.1 Mpixel, and perhaps play games with the color depth or refresh rate to keep you under the cap.

So not going to remotely entertain FHD or UHD

rough_bw = x_res * y_res * color_depth * refresh_rate

[scott239955_stm1_stmicro_com]

Thank you.  So I'm concerned that 1080p might be difficult.  We don't need high frame rates, but I don't know the color depth the UI designers are going to want.  It appears that we'd need to keep the frame rate to, say, 24 Hz and depth to 18bpp.

Also, I'm not seeing that the H7 series has a DSI interface, so is it even a candidate for HDMI video?

Scott

[mƎALLEm]

As stated by @Tesla DeLorean  you need a bridge for this.

Example the B-LCDAD-HDMI1 adapter.

See also this thread.

[Tesla DeLorean]

Yeah 1920x1080 probably just too much, 2 Mpixel

Doesn't the H747/H757 have MIPI-DSI ?

https://www.st.com/content/ccc/resource/training/technical/product_training/group0/04/62/1b/8e/e0/bc/4a/cb/STM32H7-Peripheral-DSI_HOST_interface_DSIHOST/files/STM32H7-Peripheral-DSI_HOST_interface_DSIHOST.pdf/_jcr_content/translations/en.STM32H7-Peripheral-DSI_HOST_interface_DSIHOST.pdf