Texas Instruments TMS320F28066PFPS

Overview

TMS320F28066PFPS from Texas Instruments is a 90-MHz C28x-based real-time microcontroller with integrated FPU, CLA, and advanced motor control peripherals including 16 ePWM channels (8 HRPWM-capable), 3 eCAP, 4 HRCAP, 2 eQEP, and a 12-bit 3.46-MSPS dual-sample-and-hold ADC - deployed in solar inverters, EV charging power modules, and servo drive control.

For engineers reviewing the TMS320F28066PFPS datasheet, TMS320F28066PFPS pinout, TMS320F28066PFPS application, or TMS320F28066PFPS equivalent, key selection criteria include HRPWM resolution for digital power timing, CLA offloading capability for real-time current loop execution, ADC throughput and channel count for multi-sensor feedback, and USB 2.0 host/device support for firmware update and diagnostics.

Technical Context

The TMS320F28066PFPS implements a Harvard-architecture C28x CPU with atomic instruction support and unified memory mapping, enabling deterministic interrupt latency under 6 CPU cycles. Its CLA executes floating-point math independently of the main CPU, accelerating field-oriented control (FOC) loops without compromising background task scheduling.

Peripheral integration includes dual-sample-and-hold ADC with ratio-metric VREFHI/VREFLO referencing, analog comparators routed directly to ePWM trip zones for hardware fault response, and dual zero-pin oscillators with PLL-based clock synthesis supporting precise PWM frequency modulation via HRPWM dual-edge control.

Key Specifications

Pinout & Package

Package: 80-pin PowerPAD™ HTQFP (PFP), 12.0 mm × 12.0 mm body, exposed thermal pad requiring PCB ground plane connection per TI SLMA002B design guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TMS320F28069PFP, the TMS320F28066PFPS offers reduced flash and no VCU but maintains identical HRPWM, ADC, and CLA performance - making it optimal for cost-sensitive industrial drives. Versus TMS320F280049CPN, it trades CLB and sigma-delta ADC for USB connectivity and lower BOM cost in established 80-pin layouts.

Availability

TMS320F28066PFPS is available at Aetrix Electronics and suitable for solar power optimizer, EV charging station power module, and industrial AC drive control module requiring stable component supply across extended production lifecycles.

Supply support for TMS320F28066PFPS 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, embedded processing, and connectivity technologies for industrial, automotive, and consumer applications.

The TMS320F28066PFPS belongs to the C2000™ real-time MCU product line, designed specifically for closed-loop control in motor drives, digital power, and energy conversion systems - emphasizing deterministic timing, analog integration, and computational acceleration.

FAQ

What is the maximum operating frequency of the TMS320F28066PFPS?

The TMS320F28066PFPS operates at a maximum CPU frequency of 90 MHz, corresponding to an 11.11-ns instruction cycle time. This speed is sustained across the full –40°C to 105°C industrial temperature range and is supported by on-chip PLL circuitry with external crystal or oscillator input.

Does the TMS320F28066PFPS include a floating-point unit (FPU)?

Yes, the TMS320F28066PFPS integrates a native single-precision floating-point unit (FPU) that accelerates mathematical operations in C/C++ code. This eliminates the need for software-emulated floating point and significantly improves execution speed for control algorithms such as field-oriented control (FOC) and PID tuning.

What peripherals are included in the TMS320F28066PFPS for motor control applications?

The TMS320F28066PFPS includes eight ePWM modules (16 channels, 8 HRPWM-capable), three eCAP modules, four HRCAP modules, two eQEP modules, a 12-bit 3.46-MSPS dual-sample-and-hold ADC, and three analog comparators with integrated DACs - all optimized for real-time motor control loop execution and hardware fault protection.

Is USB functionality available on the TMS320F28066PFPS?

No, USB 2.0 is not available on the TMS320F28066PFPS. USB support is present only on TMS320F2806xU, TMS320F2806xM, and TMS320F2806xF variants. The TMS320F28066PFPS retains SCI/UART, SPI, I²C, McBSP, and eCAN interfaces for communication and debugging.

What is the flash memory capacity of the TMS320F28066PFPS?

The TMS320F28066PFPS contains 64 KB of on-chip flash memory organized as 16-bit words. This flash is segmented into uniform sectors for secure firmware updates and supports code security features including 128-bit password protection and read/write locking of memory blocks.