BRT Community

General Category => Discussion - EVE => Topic started by: rmand on November 08, 2022, 08:26:00 PM

Title: Is there silicon difference between BT817Q production dates?
Post by: rmand on November 08, 2022, 08:26:00 PM

I have two boards.  One with ESP32 populated with 12Mhz Xtal and BT817Q from 2208 and the other with a 32-bit ARM populated with 12Mhz Xtal and BT817Q dated 2221.

Both boards run identical settings and displays, but the newer silicon shows the display "squished" at 72MHz.  The older one doesn't seem to have a problem.

Code: [Select]

HAL_HostCmdWrite(0x61, 0x46);

If I change the newer one's clk setting down to 60Mhz, the display looks normal. 

Code: [Select]

HAL_HostCmdWrite(0x61, 0x45);

On the oscilloscope they both show 12Mhz from the crystal and the display is the same between them.

I've seem some notes on the forum about pclk settings but I'm not sure if there is an update documentation that will point me in the right direction.

Title: Re: Is there silicon difference between BT817Q production dates?
Post by: BRT Community on November 18, 2022, 04:48:49 PM

Hello,

Thank you for your post.

I don't believe there are differences between the silicon, however we will look into this for you and get back to you soon with an update.

Best regards BRT Community