What is 128b/130b encoding?
Line coding that sends 128 data bits with a 2-bit header, about 98.5% efficient, relying on scrambling for transitions. Used from PCI Express 3.0 onward.
Field: I/O Interfaces & Buses
128b/130b encoding in the explanations
128b/130b encoding sends 128 data bits with a 2-bit header as 130 bits, so efficiency is 128/130 ≈ 98.5%, a big reduction in waste compared with 8b/10b's 80%.
Which is closest to the efficiency of the 128b/130b encodin…
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Related terms
PCI Express Throughput 8b/10b encoding AXI Bit error rate (BER) Characteristic impedance Clock and data recovery (CDR) Compute Express Link (CXL) Credit-based flow control Differential signaling