PXS20RM Datasheet, PDF (714/1368 Pages) Freescale Semiconductor, Inc – PXS20 Microcontroller

FlexRay Communication Controller
Term
MTS
NIT
PE
POC
Rx
SEQ
TCU
Tx
sync frame
startup frame
normal frame
null frame
message frame
Table 26-1. List of Terms (continued)
Definition
Media Access Test Symbol
Network Idle Time
Protocol Engine
Protocol Operation Control. Each state of the POC is denoted by POC:state
Reception
Sequencer Engine
Time Control Unit
Transmission
null frame or message frame with Sync Frame Indicator set to 1
null frame or message frame with both Sync Frame Indicator and Startup Frame Indicator
set to 1
null frame or message frame with both Sync Frame Indicator and Startup Frame Indicator
set to 0
frame with Null Frame Indicator set to 0
frame with Null Frame Indicator set to 1
26.1.3 Color coding
Throughout this chapter types of items are highlighted through the use of an italicized color font.
FlexRay protocol parameters, constants and variables are highlighted with blue italics. An example is the
parameter gdActionPointOffset.
FlexRay protocol states are highlighted in green italics. An example is the state POC:normal active.
26.1.4 Overview
The CC is a FlexRay communication controller that implements the FlexRay Communications System
Protocol Specification, Version 2.1 Rev A.
The CC has three main components:
• Controller host interface (CHI)
• Protocol engine (PE)
• Clock domain crossing unit (CDC)
A block diagram of the CC with its surrounding modules is given in Figure 26-1.
26-2
PXS20 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor