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TomV said...

The "VESA Display Data Channel Command Interface Standard Version 1.1" standard says the following about pull-ups on the DDC/CI lines:

Section 9.4: New host designs shall not use less than 2.2k Ohm (5%) pull-up resistor on both SDA and SCL lines.

Section 9.2: However, it is recommended to put a 12 to 15 kOhm pull-up resistor on both SDA and SCL signal lines in order to achieve optimum communication speed in a noisy environment, or when a VGA expander cable is used.

Feb 20, 2025, 6:17:22 PM

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