The FSI module transmits and receiv

The FSI module transmits and receives information in frames. Each frame will contain multiple phases where different information can be found. The number of phases as well as the total length of the frame will vary depending on the frame type being transmitted. Frames may be as short as 16 bits long for a ping or error frame or 288 bits long for a 16-word data frame.In normal transmission mode, there are four preamble clock edges before the start of the frame and four post-frame clock edges (postamble). Data is transmitted on both edges of the clock (double data rate).The basic frame structure is shown below. Each phase of the frame (such as start-of-frame, frame type, and so on) will be transmitted with the most significant bit first. Table 28-4 describes the basic frame structure used by the FSI and adapted according to which frame type is transmitted.