Texas Instruments F28M35E52B1RFPQ

Overview

F28M35E52B1RFPQ from Texas Instruments is a dual-core heterogeneous microcontroller integrating an ARM Cortex-M3 (master) and C28x DSP (control) on a single die, featuring 512 KB flash, 132 KB RAM, dual 12-bit ADCs (3.5 MSPS), ePWM with dead-band and trip-zone, and IPC for inter-core coordination - used in real-time motor control and digital power conversion systems.

For engineers reviewing the F28M35E52B1RFPQ datasheet, F28M35E52B1RFPQ pinout, F28M35E52B1RFPQ application, or F28M35E52B1RFPQ equivalent, key selection criteria include dual-core deterministic latency, integrated safety features (ECC flash/RAM, watchdogs, clock failure detection), and hardware-accelerated PWM timing precision for servo drives and isolated DC-DC controllers.

Technical Context

The F28M35E52B1RFPQ implements tightly coupled dual-subsystem architecture: the M3 core handles high-level communication, system management, and Ethernet/USB connectivity, while the C28x DSP executes time-critical control loops with sub-100 ns interrupt latency and dedicated peripherals including ePWM, CLA-capable ADCs, and analog comparators.

Inter-processor communication uses MSGRAMs with hardware semaphore support, enabling deterministic data exchange without bus arbitration overhead; safety mechanisms include PLL slip detection, NMIWDs, write-protected registers, and ECC-enabled 512 KB flash and 132 KB RAM - all aligned to IEC 61508 SIL-2 functional safety requirements.

Key Specifications

Pinout & Package

F28M35E52B1RFPQ is housed in a 176-pin LQFP package (24 × 24 mm, 0.5 mm pitch) with thermal pad, rated for –40°C to 105°C operation and optimized for motor control PCB layouts requiring low-inductance power and analog routing.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-core real-time control applications.

Compared with F28M35E52B1RFPQ, F28M36P63C1RFPQ offers expanded memory and CLA acceleration but removes Ethernet, while TMS320F28379DPTP provides higher C28x clock speed and ADC resolution at the cost of losing the M3 subsystem and inter-core coordination capability - choice depends on whether system-level connectivity and safety partitioning outweigh raw DSP throughput.

Availability

F28M35E52B1RFPQ is available at Aetrix Electronics and suitable for industrial servo drives, isolated DC-DC controllers, and grid-tied solar inverters requiring stable component supply, long-term lifecycle assurance, and automotive-grade temperature range support.

Supply support for F28M35E52B1RFPQ 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 wireless technologies, with decades of leadership in industrial and automotive microcontrollers.

The Concerto F28M35x product line was designed to unify real-time control and system-level connectivity in a single chip - targeting applications where deterministic DSP execution must coexist with protocol stacks, security, and diagnostics.

FAQ

What is the operating temperature range for F28M35E52B1RFPQ?

F28M35E52B1RFPQ is specified for industrial operation from –40°C to +105°C ambient temperature. This extended range supports deployment in motor drive cabinets, outdoor solar inverters, and UPS enclosures without forced cooling. The device's thermal pad and LQFP package enable reliable heat dissipation under continuous 100 MHz dual-core operation within this envelope. F28M35E52B1RFPQ maintains full parameter compliance across the entire range, including ADC accuracy and PWM timing stability.

Does F28M35E52B1RFPQ support functional safety certification out of the box?

F28M35E52B1RFPQ includes foundational safety features - ECC flash/RAM, missing clock detection, PLLSLIP monitoring, dual watchdogs, and write-protected registers - aligned with IEC 61508 SIL-2 requirements. However, system-level certification requires customer implementation of safety mechanisms (e.g., lockstep monitoring, diagnostic firmware). F28M35E52B1RFPQ itself is not pre-certified, but its hardware safety elements reduce development effort for certified industrial drives and power supplies.

Can F28M35E52B1RFPQ run EtherCAT slave stack natively?

F28M35E52B1RFPQ integrates a full EMAC + PHY and 64 KB of dedicated M3 RAM, enabling real-time EtherCAT slave stack execution without external memory. TI provides validated EtherCAT slave firmware and hardware reference designs for F28M35E52B1RFPQ. The M3 core handles protocol processing while the C28x DSP manages motion control loops - ensuring deterministic jitter <1 µs, meeting EtherCAT Class A timing requirements.

How does the IPC mechanism work between the M3 and C28x cores in F28M35E52B1RFPQ?

F28M35E52B1RFPQ uses hardware-managed MSGRAMs (6 KB shared RAM) with 8 IPC flags and semaphore registers to coordinate M3 and C28x execution. Each core accesses shared data through dedicated address windows, with semaphores preventing race conditions during read-modify-write operations. The IPC interrupt system signals completion without polling, enabling sub-microsecond inter-core handshaking - critical for synchronized PWM updates and sensor fusion in F28M35E52B1RFPQ-based systems.

What debugging interfaces does F28M35E52B1RFPQ support?

F28M35E52B1RFPQ supports IEEE 1149.1 JTAG via EMU0/EMU1 pins for full dual-core debug visibility, including independent halt/resume, register inspection, and memory access for both M3 and C28x. It also supports SWD for M3-only debugging and serial boot via SCI. TI's Code Composer Studio v12+ provides integrated dual-core debug sessions for F28M35E52B1RFPQ, with cross-triggering and synchronized breakpoints across subsystems.