Hardware Robustness for SMI Register Interfaces in Automotive PHY Chips

Overview

• Hardware Robustness for SMI Register Interfaces in Automotive PHY Chips Duration : 6 months Location : Eindhoven, Netherlands (hybrid) Background and Motivation Automotive PHY devices expose their configuration and status registers over the Serial Management Interface (SMI), a two-wire serial bus (MDC / MDIO) defined by IEEE 802.3 Clause 22/45.
• In the current implementation, the SMI link carries no inherent data-integrity protection: there is no parity bit, no CRC, and no acknowledgment mechanism in the baseline protocol.
• In a harsh automotive EMC environment, single-bit upsets on the MDIO bus can silently corrupt a register write, causing a PHY to enter an incorrect operating mode without any indication to the host.
• To guard against this, the software driver currently performs write-then-read-back verification and double-read redundancy checks.
• These software workarounds increase bus utilization, add latency to every configuration transaction, and consume CPU cycles in a safety-critical context.
• This internship investigates and prototypes hardware-based robustness mechanisms that can detect or correct bit errors on the SMI bus, or within the on-chip register file, transparently to the software layer.
• What You Will Learn SMI / MDIO protocol internals at silicon level Digital RTL design in SystemVerilog (FSMs, protocol wrappers, register-file architectures) Fault-injection verification and coverage-driven testbench methodology Professional chip-design workflow: code review, EDA tools Profile Final-year BSc in Electrical Engineering, Microelectronics, Embedded Systems, or Computer Engineering Basic digital logic design knowledge; familiarity with at least one HDL (Verilog / SystemVerilog / VHDL) Analytical, structured approach to trade-off problems; reads technical English comfortably More information about NXP in the Netherlands..