Share via

What is the implication if a HID Touchscreen device scan time is not in 100 us units?

Mark Bewley 71 Reputation points
2025-08-08T13:13:17.3633333+00:00

We have a product that uses a fairly common ILI2510-3 module to add capacitive multi-touch to an LCD.

Through software development with the hardware and Windows 11 it has been discovered that this older IC may not be compliant with latest HLK rules.

https://learn.microsoft.com/en-us/windows-hardware/design/component-guidelines/touchscreen-required-hid-top-level-collections

The Scan time does not comply with the requirement that "it must be in 100µs units".

Instead it counts in arbitrary units. Based on a 50 Hz report rate, each unit is 250µs.

We are unsure what are the implications of this deviation?

Windows for business | Windows Client for IT Pros | Devices and deployment | Set up upgrades and drivers
0 comments

Your answer

Answers can be marked as Accepted Answers by the question author, which helps users to know the answer solved the author's problem.