Texas Instruments RM48L540DPGETR

Overview

RM48L540DPGETR from Texas Instruments is a safety-certified 32-bit ARM Cortex-R4F microcontroller for industrial and medical safety-critical systems. It features dual lockstep CPUs, 2MB flash with ECC, 192KB RAM with ECC, three DCAN controllers, two 12-bit MibADCs (24 total channels), and integrated Ethernet MAC. It operates at up to 200 MHz with 1.2 V core and 3.3 V I/O supply.

For engineers reviewing the RM48L540DPGETR datasheet, RM48L540DPGETR pinout, RM48L540DPGETR application, or RM48L540DPGETR equivalent, this page delivers verified technical context, real-world use cases in functional safety systems, validated alternative parts, and precise package- and pin-level design guidance for ISO 26262/IEC 61508-compliant implementations.

Technical Context

The RM48L540DPGETR implements a dual-CPU lockstep architecture with BIST, ECC on flash and RAM, parity on peripheral memories, and error signaling via dedicated ERROR pin. Its FMPLL clock module supports frequency modulation with slip detection, and the Global Clock Module routes seven clock sources across domains.

It integrates two Next Generation High-End Timer (N2HET) coprocessors - N2HET1 with 32 programmable channels and N2HET2 with 18 - each with hardware angle generation and dedicated HTU DMA engines protected by MPU. The device also includes a 16-bit External Memory Interface supporting SDRAM and FPGA expansion.

Key Specifications

Pinout & Package

RM48L540DPGETR uses the 144-pin LQFP (PGE) package with 0.5 mm pitch, 20.0 mm × 20.0 mm body size, and green RoHS-compliant finish. Pin functions are multiplexed per IOMM configuration; default assignments include GPIO, ADC inputs, CAN transceivers, N2HET I/O, and EMIF signals.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar safety microcontroller applications.

Compared with RM48L740PGE and RM48L940PGE, the RM48L540DPGETR provides optimal cost-performance balance for mid-complexity safety applications-retaining full lockstep, ECC, and peripheral compatibility while reducing memory resources to match leaner firmware footprints.

Availability

RM48L540DPGETR is available at Aetrix Electronics and suitable for industrial safety controllers, medical infusion devices, and wind turbine pitch systems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for ISO 13485 and IATF 16949 production programs.

Supply support for RM48L540DPGETR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies with decades of automotive and industrial safety certification experience.

The RM48Lx40 product line was designed specifically for IEC 61508 and ISO 26262 functional safety applications, integrating hardware-level redundancy, memory protection, and diagnostic acceleration to reduce software certification effort.

FAQ

What safety certifications apply to the RM48L540DPGETR?

The RM48L540DPGETR is architected to support IEC 61508 SIL-3 and ISO 26262 ASIL-D compliance through dual lockstep CPUs, ECC memory, BIST, and ESM. Texas Instruments provides safety manuals, FMEDA reports, and diagnostic software libraries-but final system-level certification remains the responsibility of the end equipment manufacturer implementing RM48L540DPGETR in their design.

Does the RM48L540DPGETR support external SDRAM expansion?

Yes, the RM48L540DPGETR includes a 16-bit External Memory Interface (EMIF) that supports synchronous DRAM (SDRAM), asynchronous SRAM, and FPGA interfacing. The EMIF provides address/data multiplexing, bank control, and timing registers configurable for industrial-grade SDRAM chips operating at up to 133 MHz.

How many CAN interfaces does the RM48L540DPGETR have, and what protocol versions are supported?

The RM48L540DPGETR integrates three DCAN controllers compliant with CAN Protocol Version 2.0B, supporting both standard (11-bit) and extended (29-bit) identifiers. Each DCAN supports bit rates up to 1 Mbps and includes 64 mailboxes with parity protection, making it suitable for distributed control networks in automotive and industrial environments.

What is the role of the N2HET modules in the RM48L540DPGETR?

The RM48L540DPGETR includes two Next Generation High-End Timer (N2HET) modules: N2HET1 with 32 channels and N2HET2 with 18 channels. These are programmable timing coprocessors used for ultra-precise PWM generation, input capture, GPIO sequencing, and hardware-accelerated angle generation-offloading deterministic timing tasks from the main Cortex-R4F CPU to improve real-time predictability.

Can the RM48L540DPGETR operate with a 3.3-V-only supply, or does it require separate core and I/O rails?

The RM48L540DPGETR requires two independent supply rails: a 1.2 V nominal core supply (VCC, range 1.14–1.32 V) and a 3.3 V nominal I/O supply (VCCIO, range 3.0–3.6 V). The ADC section also requires a dedicated 3.0–5.25 V analog supply (VCCAD). These must be independently regulated and decoupled per TI's power sequencing guidelines to ensure proper startup and safety monitor operation.