Abstract: An apparatus for controlling the position of a screen pointer for an electronic device having a display screen includes a light source for illuminating an imaging surface, thereby generating reflected images. The apparatus includes a single chip for receiving the reflected images, generating digital representations of the reflected images, and generating a first set of movement data based on the digital representations of the reflected images. The first set of movement data is indicative of relative motion between the chip and the imaging surface. The single chip includes a serial interface for outputting motion data in a serial format based on the movement data.

Abstract: A multiple function pattern generator for a serializer/deserializer circuit located on an integrated circuit (IC), comprises a pattern generator in a communications channel, the pattern generator configured to develop a plurality of test patterns and configured to receive the output of the communications channel and user data based on pattern selection and user data, and a comparator configured to receive the output of the communication channel and the output of the pattern generator, where the pattern generator self seeds with the user data, and where the user data comprises a fixed length bit test pattern.