MFR4200

The MFR4200 provides the following features.
• 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.