mfr4200 Freescale Semiconductor, Inc, mfr4200 Datasheet - Page 25

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

Chapter 2
Device Overview
2.1
The FlexRay Communication Controller MFR4200 implements the FlexRay protocol in accordance with
Appendix C, “MFR4200 Protocol Implementation
Communications System Protocol Specification V1.1 for most protocol mechanisms, and complements
the protocol specification where necessary.
The controller host interface (CHI) of the FlexRay Communication Controller MFR4200 is implemented
in accordance with
2.1.1
The following list of features is not comprehensive, but is a selection of the most important features.
Detailed descriptions of the protocol and the CHI features are provided in the following.
The most important features are:
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Chapter 3, “MFR4200 FlexRay Communication
Appendix C, “MFR4200 Protocol Implementation
Bit rate up to a maximum of 10 Mbit/sec on each of two channels.
59 message buffers, each with a payload of up to 32 bytes of data.
FlexRay frames with up to 254 payload data bytes. Padding is used for FlexRay payload data that
exceeds the 32-byte data size boundary.
One configurable receive FIFO.
Each message buffer configurable as a receive message buffer, or as a transmit message buffer
(single or double), or as part of the receive FIFO.
Two receive shadow message buffers available to each channel.
Message buffer configurable with state or event semantics.
Flexible error signaling mechanism providing eight configurable counters, slot status indicators
and interrupts.
Internal measured time difference values used for clock synchronization can be read via the CHI.
The status of up to four slots can be observed independently of the communication controller
receive buffers.
The host accesses all message buffers by means of three active message buffers (active transmit
message buffer, active message receive buffer, and active receive FIFO buffer) in the CHI.
Configurable message filtering based on frame ID, cycle counter, and channel, for transmit and
receive message buffers.
Configurable message filtering based on frame ID, channel, and message ID, for the receive FIFO.
Duration of the communication cycle configurable in microticks.
Introduction
Features
Chapter 3, “MFR4200 FlexRay Communication
MFR4200 Data Sheet, Rev. 0
Document”. This appendix refers to FlexRay
Controller”
Document”
Controller”.
Introduction
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