Texas Instruments TMS320F280260PTT

Overview

TMS320F280260PTT from Texas Instruments is a 50-MHz C28x-core Piccolo™ microcontroller in 48-pin LQFP packaging, featuring 8K × 16-bit on-chip flash, 3K × 16-bit SARAM, 6-channel 12-bit ADC with 800-ns conversion time, and three 32-bit CPU timers. It integrates ePWM (6 channels), eCAP (1 input), SPI, I²C, SCI, and on-chip voltage regulation for single 3.3-V supply operation in motor control and power conversion systems.

For engineers reviewing the TMS320F280260PTT datasheet, TMS320F280260PTT pinout, TMS320F280260PTT application, or TMS320F280260PTT equivalent, key selection criteria include flash size (8K words), ADC resolution and speed, ePWM channel count, GPIO count (22 multiplexed), and LQFP-48 thermal and layout compatibility.

Technical Context

The TMS320F280260PTT implements the TMS320C28x 32-bit fixed-point CPU core with 20-ns instruction cycle time, Harvard bus architecture, and unified memory programming model. It supports atomic operations, fast interrupt response with automatic context save, and little-endian data handling.

Its peripheral subsystem includes a 32-bit peripheral bus with PIE interrupt expansion, dynamic PLL ratio changes, missing-clock detection, and integrated power-on/brown-out reset. The ADC operates at full SYSCLKOUT (50 MHz) without prescaling and supports ratio-metric VREFHI/VREFLO references.

Key Specifications

Pinout & Package

Package: PT variant denotes 48-pin LQFP (Low-Profile Quad Flatpack), 7 mm × 7 mm body, 0.5-mm lead pitch, exposed thermal pad (not electrically connected), JEDEC MS-026 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TMS320F280260PTT, the TMS320F280270PTT offers double flash capacity at identical speed and package, while the TMS320F280230PTT trades 10-MHz CPU bandwidth for increased flash-enabling flexible trade-offs between algorithm complexity, real-time latency, and firmware scalability.

Availability

TMS320F280260PTT is available at Aetrix Electronics and suitable for industrial motor control, white goods inverter drives, and eBike powertrain systems requiring stable component supply across multi-year production cycles.

Supply support for TMS320F280260PTT 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 expertise in industrial and automotive microcontrollers.

The TMS320F2802x0 Piccolo™ family targets cost-sensitive, high-efficiency digital power and motor control applications, emphasizing integration, low system cost, and real-time determinism in compact packages.

FAQ

What is the maximum operating frequency of the TMS320F280260PTT?

The TMS320F280260PTT operates at a maximum CPU frequency of 50 MHz, corresponding to a 20-ns instruction cycle time. This speed is achieved using the internal PLL with an external crystal or oscillator input, and it applies to all on-chip peripherals including ePWM, ADC, and timers. The TMS320F280260PTT maintains full specification compliance-including timing, ADC accuracy, and flash write/erase-across its rated temperature range (–40°C to +105°C) at this frequency.

Does the TMS320F280260PTT support hardware-based code security?

Yes, the TMS320F280260PTT includes a dedicated Code Security Module with 128-bit password protection for on-chip flash, SARAM, and OTP memory blocks. Once enabled, it prevents unauthorized read access via JTAG or boot ROM interfaces. The security password is stored in fixed flash locations (0x3F7FF8–0x3F7FFF), and programming it requires careful initialization to avoid permanent lockout. This feature is fully implemented in silicon and does not rely on external components or software-only enforcement.

How many ePWM channels does the TMS320F280260PTT provide?

The TMS320F280260PTT provides six ePWM output channels across three independent ePWM modules (ePWM1, ePWM2, ePWM3). Each module includes complementary A/B outputs, dead-band generation, trip-zone inputs for hardware fault shutdown, and an independent 16-bit time-base counter. These channels are fully functional in the PT (48-pin LQFP) package and are accessible on dedicated GPIO pins with no multiplexing conflict in default configuration.

Is the ADC on the TMS320F280260PTT synchronous with the CPU clock?

Yes, the 12-bit ADC in the TMS320F280260PTT runs synchronously with the SYSCLKOUT signal (50 MHz), requiring no prescaler and delivering 1.25 MSPS throughput with 800-ns conversion time. Its sample-and-hold circuitry supports simultaneous sampling across multiple channels, and the ADC interface uses zero-overhead result loading into CPU-accessible registers-enabling deterministic sampling intervals critical for motor current reconstruction and control loop stability.

What boot modes are supported by the TMS320F280260PTT?

The TMS320F280260PTT supports five boot modes selected via GPIO37, GPIO34, and TRST pins: SCI (UART), SPI, I²C, Parallel I/O, and emulation boot. The Boot ROM contains factory-programmed loader firmware for each mode, and GPIO pins used for boot (e.g., SCIRXDA/SCITXDA for SCI mode) are documented in Table 2-7 of the SPRS810B datasheet. Emulation boot activates automatically when a JTAG debugger is connected, bypassing pin-based selection.