On Sat, Jan 18, 2020 at 12:46 AM Mike Banon <mikebdp2@gmail.com> wrote:

Is that something like a cable with two built-in FT232H chips ? (to
function as a USB dongle)

no, the CCD debug functionality is in the Google security chip (CR50) which detects the special debug cable (https://www.sparkfun.com/products/14746 -- schematics linked) on a specific port and then enables the features according to the CCD state (open/locked)