CH55X is a 8-bit 8051 core's MCU of QingHeng Co.
CH55x support USB core, Clock up to 24 MHz. most cost-effective MCU.
This project turns the i2c interface tpic to USB Multitouch(a HID device) device via CH55X.
That's cool, once you plug the device to your laptop, and your display screen turns it to be a touchsreen.