Texas Instruments F28M35M22C1RFPS

Overview

F28M35M22C1RFPS from Texas Instruments is a dual-core Concerto™ microcontroller integrating an Arm® Cortex®-M3 master subsystem (75 MHz) and a TMS320C28x real-time control subsystem (75 MHz), with 256KB flash (ECC), 32KB RAM (parity/ECC), 64KB shared RAM, dual 12-bit ADCs (2.88 MSPS), six comparators with integrated DACs, and dual CAN interfaces - designed for industrial motor drives and solar inverters.

For engineers reviewing the F28M35M22C1RFPS datasheet, F28M35M22C1RFPS pinout, F28M35M22C1RFPS application, or F28M35M22C1RFPS equivalent, key selection criteria include dual-core clock coordination (75/75 MHz), HTQFP-144 PowerPAD thermal packaging, IPC-based interprocessor communication, and support for safety-critical control loops requiring ECC memory and hardware watchdogs.

Technical Context

The F28M35M22C1RFPS implements a tightly coupled dual-subsystem architecture: the Cortex-M3 handles Ethernet 1588, USB OTG, and multi-protocol communications (5 UARTs, 4 SSI/SPI, 2 I²C, 2 CAN), while the C28x executes deterministic real-time control using nine ePWM modules (18 outputs, 16 high-resolution), six eCAP, three eQEP, and VCU-accelerated math. Both cores share 64KB parity-protected RAM and coordinate via 32-channel IPC with 2KB message RAM.

Clocking uses independent PLLs with dynamic ratio changes; the M3 and C28x operate at synchronized 75 MHz (per Table 5-2), supported by on-chip 1.2-V digital, 1.8-V analog, and 3.3-V I/O regulation. Safety features include dual security zones (128-bit password), ECC on flash and critical RAM, NMI watchdogs per subsystem, and fault trip zones across 64 GPIO pins.

Key Specifications

Pinout & Package

144-pin RFP PowerPAD™ Thermally Enhanced Thin Quad Flatpack (HTQFP) with exposed thermal pad soldered to PCB ground plane for optimal heat transfer and digital grounding.

Key Features

Applications

Equivalent & Alternatives

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

Compared with F28M35M22C1RFPS, F28M35M52C1RFPS offers higher Cortex-M3 bandwidth for complex protocols, while F28M35H22C1RFPS adds Ethernet 1588 - both retain identical C28x control capability, shared RAM, and safety features, making them drop-in replacements for pin-compatible PCBs with appropriate peripheral enablement.

Availability

F28M35M22C1RFPS is available at Aetrix Electronics and suitable for AC drive control modules, servo drive control modules, string inverters, and central inverters requiring stable component supply across extended industrial temperature ranges.

Supply support for F28M35M22C1RFPS 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 company specializing in analog and embedded processing technologies, with leadership in industrial, automotive, and power management solutions.

The F28M35x Concerto™ family integrates Arm and C28x cores to address industrial motor control, renewable energy, and power conversion applications where deterministic real-time performance and robust connectivity coexist on a single chip.

FAQ

What is the maximum operating frequency of each core in the F28M35M22C1RFPS?

The F28M35M22C1RFPS operates its Arm Cortex-M3 master subsystem at 75 MHz and its TMS320C28x control subsystem at 75 MHz, as defined in Table 5-2 of the SPRS742L datasheet. This coordinated speed pairing ensures optimal balance between communication throughput and real-time control latency without violating clock domain constraints.

Does the F28M35M22C1RFPS include Ethernet MAC or PHY functionality?

No, the F28M35M22C1RFPS does not include Ethernet MAC or PHY functionality. Unlike the H-series variants (e.g., F28M35H22C), the M-series omits the 10/100 ENET 1588 MII peripheral entirely - confirmed in Table 5-1 of the datasheet - making it suitable for applications relying on CAN, UART, or USB instead of Ethernet.

How much flash memory does the F28M35M22C1RFPS have, and is it protected?

The F28M35M22C1RFPS includes 256KB of on-chip flash memory with Error Correction Code (ECC) protection. This ECC implementation detects and corrects single-bit errors and detects double-bit errors, ensuring firmware reliability in electrically noisy industrial environments per TI's safety documentation.

What analog capabilities does the F28M35M22C1RFPS provide for motor control?

The F28M35M22C1RFPS integrates dual 12-bit ADCs capable of 2.88 MSPS aggregate sampling, 20 total input channels, four sample-and-hold circuits, and six analog comparators with integrated 10-bit DACs - enabling simultaneous current/voltage sensing, fast overcurrent protection, and analog reference generation without external components.

Is the F28M35M22C1RFPS pin-compatible with other F28M35x devices in the same package?

Yes, the F28M35M22C1RFPS is pin-compatible with all other F28M35x devices in the 144-pin HTQFP (RFP) package, including F28M35M52C1RFPS and F28M35H22C1RFPS. Pin assignments, power domains, and GPIO multiplexing are identical - verified in Section 6.1 (Pin Diagram) and Table 5-1 of the SPRS742L datasheet.