Location: Bangalore, India | Company: LTSCT — L&T; Semiconductor Technologies Limited Reporting To: Chandra — Senior Architect, DC HW Systems | Experience: 10+ years (mandatory) Role Summary The DTMA & Memory Controller Design Lead owns the Data Transfer and Memory Access (DTMA) engine together with HBM4e memory-controller integration.

You will orchestrate all data movement between the 512-bank SRAM (8 TB/s), the 6-stack HBM4e subsystem (384 GB, 12 TB/s), and the PE arrays — the subsystem that keeps xPU's compute engine saturated.

Key Responsibilities •Own micro-architecture and RTL of the DTMA engine managing data movement between SRAM banks, HBM4e, and the BFOS PE arrays. • Define the compute-to-memory interface with the DTMA engine and SRAM banks to keep PE arrays fully fed at bandwidth. • Lead integration and configuration of HBM4e memory controllers across 6 stacks (384 GB, 12 TB/s aggregate). • Design descriptor-based DMA, gather/scatter, tensor-tiling, and prefetch mechanisms optimized for BFOS dataflow. • Architect the 512-bank, 8 TB/s SRAM access scheduling, bank arbitration, and conflict-avoidance logic. • Optimize address mapping, request scheduling, and refresh/timing to maximize sustained HBM bandwidth efficiency. • Define QoS and flow-control interfaces to the NoC and compute engine to prevent stalls and starvation. • Drive verification, performance modeling,



and bandwidth/latency closure across realistic AI workload traffic. • Collaborate with PD on HBM PHY/controller placement and with architecture on memory-hierarchy trade-offs.

Required Skills & Experience • 10+ years in memory-subsystem, DMA, or memory-controller design for high-bandwidth SoCs. • Deep expertise with DRAM/HBM controller architecture, scheduling, and timing (HBM2E/HBM3/HBM3E; HBM4e a strong plus). • Robust RTL (System

Verilog) design skills for DMA engines, arbiters, and memory schedulers. • Solid understanding of multi-bank SRAM architectures, banking/interleaving, and conflict resolution. • Experience with descriptor-based DMA, gather/scatter, tensor tiling, and prefetching. • Knowledge of address mapping, request reordering, and bandwidth/efficiency optimization. • Familiarity with AI/ML data-movement patterns and their impact on memory-system design. • Hands-on performance modeling and closure for high-bandwidth memory subsystems. • Proficiency in C/C++/Python for modeling and verification. • Proven technical leadership and cross-functional collaboration.

Preferred Qualifications • Experience integrating HBM PHY/controller IP on advanced nodes. • Background in AI accelerator or HPC memory subsystems. • Familiarity with UCIe/NoC traffic interaction with memory controllers. • M.

Tech/MS in EE/ECE or equivalent.

📌 DTMA & Memory Controller Design Lead (India)
🏢 Larsen and Toubro
📍 India