TSS461 ATMEL Corporation, TSS461 Datasheet - Page 44

• Manufacturer Part Number: TSS461
• Description: VAN Data Link Controller
• Manufacturer: ATMEL Corporation

Priority Among
the Different
Channels
44
TSS461E
The priority handling on the VAN bus is already explained in the Line Interface section. The pri-
orities for the messages in the TSS461E is, however, slightly different.
For instance, it's possible that an identifier matches two or more of the identifiers programmed
into the registers. In this case, it is the lowest identifier number that has priority. i.e., if both iden-
tifier 5 and 10 match the identifier received, it is the identifier 5 that will receive the message.
However, since the identifier 5 will become an inactive message when it has received the frame,
the next time the same identifier is seen on the bus, the corresponding data will be received by
identifier 10.
The same is valid for messages to be transmitted, i.e., if two or more messages are ready to be
transmitted, it is the one with the lowest identifier number that will get priority.
4194C–AUTO–01/06