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• SUGOI = SLAC Ultimate Gateway Operational Interface
• Targeted for ASIC register communication and timing/trigger synchronization
• point-to-point communication
• Serial Encoding: 8B10B (DC balanced)
  
  • Targeting communication to ASIC over fiber optic or long copper cables
• Serial Rate: Same as reference clock sent to ASIC
• Supports fixed latency communication

Control Code

The protocol defines several K-Codes to indicate data framing, flow-control, opcodes, and other metadata. For all K-Codes, the most significant 8 bits of the 64-bit word indicate which code it is. This is known as the Block Type Field (BTF). The next byte after BTF is a 8-bit checksum of entire 64-word (including BTF). The lower 48 bits are then specified differently depending on the K-Code.