MPC5644A Microcontroller Reference Manual, Rev. 6Freescale Semiconductor 1441Chapter 33FlexRay Communication Controller (FlexRay)33.1 Introduction33.1.1 ReferenceThe following documents are referenced.• FlexRay Communications System Protocol Specification, Version 2.1 Rev A1• FlexRay Communications System Electrical Physical Layer Specification, Version 2.1 Rev A33.1.2 GlossaryThis section provides a list of terms used in this chapter.1. The FlexRay Specifications have been developed for automotive applications.The FlexRay Specifications have been neitherdeveloped nor tested for non-automotive applications.Table 33-1. List of termsTerm DefinitionBCU Buffer Control Unit—Handles message buffer accessBMIF Bus Master Interface—Provides master access to FlexRay memory areaCC FlexRay Communication Controller—Module described in this chapterCDC Clock Domain CrosserCHI Controller Host InterfaceCycle length in μT The actual length of a cycle in μT for the ideal CC (+/- 0 ppm)EBI External Bus InterfaceFlexRay memory area Memory area to store the physical message buffer payload data, frame header, frameandslot status, and synchronization frame related tablesSystem memory Memory that contains the FlexRay memory areaSystem Bus Bus that connects the CC and system memoryFSS Frame Start SequenceHIF Host Interface—Provides host access to the CCHost The FlexRay CC host CPULUT Look Up Table—Stores message buffer header index valueMB Message BufferMBIDX Message Buffer Index—The position of a header field entry within the header area. If theheader area is accessed as an array, this is the same as the array index of the entry.MBNum Message Buffer Number—Position of message buffer configuration registers within theregister map. For example, Message Buffer Number 5 corresponds to the MBCCS5register.
