The trigger frame is output from the TI core for every trigger block.

• Trigger Header (64-bits)
  • Word 0 (32-bits)
    • 31:27 = 0x80 (block header indicator)
    • 26:22 = BoardID (TI Specific)
    • 21:18 = 0x0 (ID for TI Board)
    • 17:08 = Block number, (lower 10 bits)
    • 07:00 = Block size
  • Word 1 (32-bits)
    • 31:17 = 0xFF10 (bit 17 can be either 1 or 0)
    • 16 = 1 if timestamp is available, 0 if not
    • 15:08 = 0x20
    • 07:00 = Block size

After the trigger header there is a trigger event word for each trigger in the block

• Trigger Event (64-bits or 128-bits)
  • Word 0 (32-bits)
    • 31:24 = Trigger Type
    • 23:16 = 0x01
    • 15 = SYNC Flag
    • 14:00 = Event word count, word 0 is excluded from the count
  • Word 1 (32-bits)
    • 31:00 = Trigger number
  • Word 2 (32-bits) Included if Event word count is greater than 1
    • 31:00 = Trigger timing in 4ns steps
  • Word 3 (32-bits) Included if Event word count is greater than 1
    • 31:16 = Trigger number bit 47:32, to form 48 bit counter with word 1
    • 15:00 = Trigger timing bits 47:32, to form 48 bit timing with word 2