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Module Operation
1261
SPNU563A–March 2018
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FlexRay Module
Header 2 (Word 1)
Write access through WRHS2, read access through RDHS2:
• Header CRC Transmit Buffer: Configured by the host (calculated from frame header)
– Receive Buffer: Updated from received frame
• Payload Length Configured: Length of data section (2-byte words) as configured by the host
• Payload Length Received: Length of payload segment (2-byte words) stored from received frame
Header 3 (Word 2)
Write access through WRHS3, read access through RDHS3:
• Data Pointer- Pointer to the beginning of the corresponding data section in the data partition
Read access through RDHS3, valid for receive buffers only, updated from received frames:
• Receive Cycle Count - Cycle count from received frame
• RCI- Received on Channel Indicator
• SFI- Startup Frame Indicator
• SYN- Sync Frame Indicator
• NFI- Null Frame Indicator
• PPI- Payload Preamble Indicator
• RES- REServed bit
Message Buffer Status MBS (Word 3)
Read access through MBS, updated by the communication controller at the end of the configured slot.
• VFRA- Valid Frame received on channel A
• VFRB- Valid Frame received on channel B
• SEOA- Syntax Error Observed on channel A
• SEOB- Syntax Error Observed on channel B
• CEOA- Content Error Observed on channel A
• CEOB- Content Error Observed on channel B
• SVOA- Slot Boundary Violation Observed on channel A
• SVOB- Slot Boundary Violation Observed on channel B
• TCIA- Transmission Conflict Indication channel A
• TCIB- Transmission Conflict Indication channel B
• ESA- Empty Slot Channel A
• ESB- Empty Slot Channel B
• MLST- Message Lost
• FTA- Frame Transmitted on Channel A
• FTB- Frame Transmitted on Channel B
• Cycle Count Status- Current cycle count when status was updated
• RCIS- Received on Channel Indicator Status
• SFIS- Startup Frame Indication Status
• SYNS- Sync Frame Indicator Status
• NFIS- Null Frame Indicator Status
• PPIS- Payload Preamble Indicator Status
• RESS- Reserved Bit Status
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