A method and apparatus implementing an enhanced protocol between an I2C master and an I2C slave. The set of UWs is constructed by breaking a UW sequence in to equal length segments, and then multiplying this vector by an orthogonal matrix. Spaces between gate patterns on the first region are narrower than spaces between gate patterns on the second region. A pressure member contacts and presses to the hinge boss to reduce the rotation speed of the hinge boss.