Uses an embedded-clock, 3-wire embedded trio signaling mechanism. It achieves higher spectral efficiency (approx. 2.28 bits per symbol) but requires complex multi-level signaling and clock-data recovery (CDR) circuitry.
For ASIC or system-on-chip (SoC) developments, utilizing validated third-party Hard IP blocks (from vendors like Synopsys or Cadence) is mandatory to guarantee that the analog front-end meets the stringent v2.5 voltage levels and clock-recovery constraints. 2. Skew Management and Board Layout
For reliable operation above 2.5 Gbps, v2.5 mandates an and a Preamble Sequence with an Extended Sync Pattern . These mechanisms actively compensate for voltage and temperature variations, ensuring stable and error-free data transmission across all operating conditions.
LP-11 (Stop State) │ ▼ LP-01 (Drive Flip) │ ▼ LP-00 (Prepare State) ──► Start of THS-PREPARE window │ ▼ HS-0 (Zero State) ──► Receiver connects 100Ω termination (THS-ZERO) │ ▼ HS-SYNC Pattern ──► Leader sequence for RX word alignment │ ▼ HS Data Payload ──► Active streaming data (Up to 4.5 Gbps) │ ▼ HS-TRAIL / Post-amble ──► End of burst; disconnects termination │ ▼ Return to LP-11 Critical Timing Constraints to Enforce