Texas Instruments F28M35E32C1RFPT

Overview

F28M35E32C1RFPT from Texas Instruments is a dual-core heterogeneous microcontroller integrating an ARM Cortex-M3 (master) and C28x DSP (control) on a single die, featuring 256 KB flash, 64 KB RAM, ePWM, ADC, and IPC for real-time motor control and power conversion systems. It operates at 100 MHz (M3) and 150 MHz (C28x), supports IEEE 754 single-precision floating-point, and includes ECC-protected memory.

For engineers reviewing the F28M35E32C1RFPT datasheet, F28M35E32C1RFPT pinout, F28M35E32C1RFPT application, or F28M35E32C1RFPT equivalent, key selection criteria include dual-core deterministic latency, integrated safety features (PLLSLIP detection, NMIWDs, register write protection), and hardware-accelerated motor control peripherals including 16-channel ePWM with dead-band and trip-zone support.

Technical Context

The F28M35E32C1RFPT implements a tightly coupled dual-subsystem architecture: the M3 core handles high-level communication, system management, and HMI, while the C28x DSP executes time-critical control loops with cycle-accurate PWM generation and fast ADC sampling. Inter-processor communication occurs via MSGRAMs and hardware IPC flags with interrupt synchronization.

Clocking is managed through independent PLLs per subsystem-M3 uses a 100-MHz PLL with missing-clock detection, and C28x uses a 150-MHz PLL with PLLSLIP monitoring. Safety mechanisms include ECC on flash and RAM, watchdog timers (M3 WDT + C28x WD), and µCRC for firmware integrity verification.

Key Specifications

Pinout & Package

Package: 176-pin HTQFP (FPT), RoHS-compliant, thermally enhanced with exposed thermal pad. Dimensions: 24 mm × 24 mm × 1.6 mm (max height). Compatible with standard QFP reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with F28M35E32C1RFPT, F28M36P63C1RFPT adds security and bandwidth for automotive-grade OBCs, while TMS320F28379DPTP trades dual-core flexibility for raw DSP throughput and larger memory-making it optimal for legacy C28x codebases targeting servo amplifiers.

Availability

F28M35E32C1RFPT is available at Aetrix Electronics and suitable for industrial motor drives, uninterruptible power supplies, solar inverters, and EV onboard chargers requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for F28M35E32C1RFPT 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 digital signal processing technologies, with decades of leadership in industrial and automotive control ICs.

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

FAQ

What is the maximum operating frequency of each core in the F28M35E32C1RFPT?

The F28M35E32C1RFPT features two independent clock domains: the ARM Cortex-M3 core runs at up to 100 MHz, and the TMS320C28x DSP core operates at up to 150 MHz. These frequencies are achieved using separate PLLs with dedicated clock supervision-including missing-clock detection for the M3 and PLLSLIP detection for the C28x-ensuring reliable timing under varying thermal and voltage conditions. The F28M35E32C1RFPT datasheet confirms these ratings across industrial temperature range (–40°C to 105°C).

Does the F28M35E32C1RFPT support hardware-based inter-processor communication between its M3 and C28x cores?

Yes, the F28M35E32C1RFPT implements dedicated hardware IPC with MSGRAMs (shared memory), flag registers, and interrupt synchronization logic. This allows lock-free, deterministic message passing between the M3 and C28x subsystems with sub-100 ns latency-critical for coordinated PWM updates and real-time fault responses. The F28M35E32C1RFPT Technical Reference Manual (SPRUH22I) details MTOC/CTOM register access and semaphore usage in Section 1.12.

What safety features are integrated into the F28M35E32C1RFPT for industrial applications?

The F28M35E32C1RFPT includes multiple hardware-enforced safety mechanisms: ECC on flash and RAM, PLLSLIP and missing-clock detection, dual independent watchdog timers (M3 WDT and C28x WD), register write protection, µCRC for firmware validation, and NMIWDs for immediate fault escalation. These features collectively support SIL-2 compliance in motor drives and UPS systems, as documented in the F28M35E32C1RFPT safety manual and SPRUH22I Section 1.6.

Can the F28M35E32C1RFPT's ePWM module support dead-band generation and trip-zone protection simultaneously?

Yes, the F28M35E32C1RFPT's 16-channel ePWM module integrates both dead-band generator (DB) and trip-zone (TZ) submodules per channel. The DB submodule inserts programmable delay between complementary PWM outputs to prevent shoot-through, while the TZ submodule monitors external fault signals (e.g., overcurrent, overtemperature) and forces immediate PWM shutdown with configurable blanking. This dual capability is verified in the F28M35E32C1RFPT ePWM technical reference (Section 7.2.5 and 7.2.7 of SPRUH22I).

Is the F28M35E32C1RFPT pin-compatible with other Concerto devices such as the F28M36x series?

The F28M35E32C1RFPT is pin-compatible with the F28M36P63C1RFPT variant in the same 176-pin HTQFP (FPT) package-sharing identical pin count, mechanical footprint, and power/ground assignments. However, signal functionality differs on several pins (e.g., CAN FD vs. CAN 2.0B, additional security accelerator I/O), so PCB layout reuse requires careful review of the F28M35E32C1RFPT and F28M36P63C1RFPT pin multiplexing tables before migration.