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1431

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Module Operation

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

1203

SPNU563–May 2014 FlexRay Module

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