mfr4200 Freescale Semiconductor, Inc, mfr4200 Datasheet - Page 22

• Manufacturer Part Number: mfr4200
• Description: Flexray Communication Controllers
• Manufacturer: Freescale Semiconductor, Inc

Introduction
1.3
22
AMI
BG
CC
ceil
Cycle length in µT
EBI
FSS
Host
LSB
MCU
MSB
MT
µT
NIT
PHY
PS
PWD
RX
TCU
TX
TDMA
active-high
active-low
asserted
negated
set
clear
Term
Terminology
Asynchronous memory interface
Bus guardian
Communication controller (an alternative term for the MFR4200)
Function ceil(x) returns the nearest integer greater than or equal to x
The actual length of a cycle in µT for the ideal controller (± 0 ppm)
External bus interface
Frame start sequence
The FlexRay CC host MCU
Less/least significant bit
Microcontroller
Macrotick
Microtick
Network idle time
Physical interface
FlexRay Communications System Protocol Specification
Protocol working document
Reception
Time control unit
Transmission
Names of signals that are active-high are shown in upper case text, without a ‘#’ symbol at the end.
Active-high signals are asserted (active) when they are high and negated when they are low.
A ‘#’ symbol at the end of a signal name indicates that the signal is active-low.
An active-low signal is asserted (active) when it is at the logic low level and is negated when it is at the
logic high level.
A signal that is asserted is in its active logic state. An active-low signal changes from high to low when
asserted; an active-high signal changes from low to high when asserted.
A signal that is negated is in its inactive logic state. An active-low signal changes from low tohigh when
negated; an active-high signal changes fromhigh to low when negated.
To set a bit means to establish logic level one on the bit.
To clear a bit means to establish logic level zero on the bit.
More/most significant bit
Time division multiplex access
Table 1-1. Acronyms and Abbreviations
Table 1-2. Notational Conventions
MFR4200 Data Sheet, Rev. 0
Meaning
Freescale Semiconductor