Fixed-point numbers and their data types are characterized by their word size in bits, binary point, and whether they are signed or unsigned. The Fixed-Point Designer™ software supports integers and fixed-point numbers. The main difference among these data types is their binary point.
Note: Fixed-point numbers can have a word size up to 128 bits.
A common representation of a binary fixed-point number , either signed or unsigned, is shown in the following figure.