DTMA &

- Memory Controller Design Lead DTMA &
- Memory Controller Design Lead 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 solid plus). Strong RTL (SystemVerilog) 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.

📌 Memory Controller and Data Transfer Design Lead (Bengaluru)
🏢 Larsen u0026 Toubro
📍 Bengaluru