mfr4300 Freescale Semiconductor, Inc, mfr4300 Datasheet - Page 29

• Manufacturer Part Number: mfr4300
• Description: Flexray Communication Controllers
• Manufacturer: Freescale Semiconductor, Inc

Chapter 2
Device Overview
2.1
The MFR4300 FlexRay Communication Controller implements the FlexRay protocol according to the
FlexRay Communications System Protocol Specification V2.1.
The controller host interface (CHI) of the MFR4300 FlexRay Communication Controller is implemented
in accordance with
2.2
The MFR4300 FlexRay controller provides the following features:
Freescale Semiconductor
•
•
•
•
•
•
•
•
•
•
Single channel support
— Internal channel A and FlexRay Port A can be configured to be connected either to physical
128 configurable message buffers with
— Individual frame ID filtering
— Individual channel ID filtering
— Individual cycle counter filtering
Message buffer header, status and payload data are stored in FlexRay memory
— Consistent data access ensured by means of buffer locking scheme
— Host can lock multiple buffers at the same time
Size of message buffer data section configurable from 0 up to 254 bytes
Two independent message buffer segments with configurable size of payload data section
— Each segment can contain message buffers assigned to the static segment and message buffers
Zero padding for transmit message buffers in static segment
— Applied when the frame payload length exceeds the size of the message buffer data section
Transmit message buffers configurable with state/event semantics
Message buffers can be configured as
— Receive message buffers
— Single buffered transmit message buffer
— Double buffered transmit message buffer (combines two single buffered message buffer)
Individual message buffer reconfiguration supported
— Means provided to safely disable individual message buffers
— Disabled message buffers can be reconfigured
Two independent receive FIFOs
Introduction
Features
FlexRay channel A or physical FlexRay channel B
assigned to the dynamic segment at the same time
Chapter 3, “FlexRay Module (FLEXRAYV2)”
MFR4300 Data Sheet, Rev. 3
of this data sheet.
29