mfr4200 Freescale Semiconductor, Inc, mfr4200 Datasheet - Page 53

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

Chapter 3
MFR4200 FlexRay Communication Controller
3.1
This version of the MFR4200 communication controller block guide supports MFR4200 devices with the
mask numbers 0L60X and 1L60X.
3.1.1
The MFR4200 provides the following features.
Freescale Semiconductor
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
The FlexRay protocol according to FlexRay Protocol Working document (PWD) V1.1, with
differences described in the MFR4200 Protocol Implementation Document (PID)
Data rate of up to 10 Mbit/s on each of two channels
FlexRay frames with up to 254 payload bytes (padding is used for FlexRay payload data that
exceeds 32-byte data size boundary)
One configurable receive FIFO
Configurable counters, status indicators, and interrupts dedicated to error signalling
Measured value indicators for clock synchronization
The status of up to four slots can be observed independently of CC receive message buffers
Configurable error signaling
Fractional macroticks (MT) supported for clock correction
59 message buffers, each with up to 32 payload bytes
Message buffers configurable with state or event semantics
Each message buffer can be configured as a receive message buffer, as a transmit message buffer
(single or double), or as a part of the receive FIFO
Receive background buffers for each channel
The host accesses all buffers by means of three active message buffers (active transmit message
buffer, active receive message buffer and active receive FIFO buffer)
Filtering for frame ID, cycle counter, and channel for receive and transmit message buffers
Filtering for frame ID, channel, and message ID for the receive FIFO
Maskable interrupt sources provided over one interrupt line
Two types of host interface: HCS12 interface and asynchronous memory interfaces
Minislot action point offset is configurable
Static slot action point offset is configurable
Hardware selectable clock output to drive external host devices: disabled/4/10/40 MHz
Electrical physical layer interface compatible with dedicated FlexRay physical layer. Industry
standard RS485 physical layer interface also available.
Introduction
MFR4200 Features
MFR4200 Data Sheet, Rev. 0
53