Texas Instruments TMS320F2811PBKA

Overview

TMS320F2811PBKA from Texas Instruments is a 150-MHz C28x-core digital signal processor optimized for real-time motor control and power electronics, featuring 128K × 16 flash, 18K × 16 SARAM, 12-bit 16-channel ADC (80 ns conversion), dual Event Managers (EVA/EVB), and eCAN interface - deployed in industrial motor drives and EV powertrain subsystems.

For engineers reviewing the TMS320F2811PBKA datasheet, TMS320F2811PBKA pinout, TMS320F2811PBKA application, or TMS320F2811PBKA equivalent, key selection criteria include 128-pin LQFP package compatibility, 1.8-V/1.9-V core voltage support at 135–150 MHz, on-chip code security (128-bit key), and absence of external memory interface (XINTF) compared to F2812 variants.

Technical Context

The TMS320F2811PBKA implements the TMS320C28x 32-bit CPU with Harvard architecture, atomic instructions, and 4M linear address space. It integrates two independent Event Managers (EVA/EVB) supporting 16 PWM outputs, 6 capture/QEP channels per module, and trip-zone protection for IGBT gate drivers.

Its peripheral set includes eCAN v2.0B, two SCIs (UART), SPI, McBSP, three 32-bit CPU timers, and a PIE block managing 45 peripheral interrupts. The 12-bit ADC supports simultaneous sampling across two 8-channel multiplexers with dedicated sample-and-hold circuits.

Key Specifications

Pinout & Package

128-pin Low-Profile Quad Flatpack (LQFP), PBK package, 14.0 mm × 14.0 mm body size, 0.4-mm pitch, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital signal processor applications.

Compared with TMS320F2812PGF, TMS320F2811PBKA offers identical processing capability in a smaller 128-pin footprint without XINTF overhead - ideal for space-constrained motor controllers. Versus TMS320F28035PNT, it delivers higher clock speed, larger memory, and CAN connectivity at the expense of HRPWM precision.

Availability

TMS320F2811PBKA is available at Aetrix Electronics and suitable for industrial motor drives, electric vehicle powertrain subsystems, and renewable energy inverters requiring stable component supply across extended product lifecycles.

Supply support for TMS320F2811PBKA 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 over 90 years of innovation in industrial and automotive electronics.

The TMS320F281x series was designed specifically for real-time digital control in power electronics - emphasizing deterministic interrupt response, integrated motor peripherals (EVMs, ADC), and robust code security for firmware IP protection.

FAQ

What is the maximum operating frequency and core voltage specification for the TMS320F2811PBKA?

The TMS320F2811PBKA operates at up to 150 MHz with a 1.9-V core supply, or 135 MHz at 1.8-V core. Its 3.3-V I/O interface remains compatible across both core voltage configurations. This dual-voltage operation allows system designers to balance performance and power consumption based on thermal constraints - the TMS320F2811PBKA maintains full peripheral functionality and timing compliance at either setting without configuration changes.

Does the TMS320F2811PBKA include an external memory interface (XINTF)?

No, the TMS320F2811PBKA does not include the external memory interface (XINTF). Unlike the TMS320F2812 variants (e.g., PGF, GHH packages), the PBK package variant is intentionally configured without XINTF signals - confirmed by device comparison tables and pin diagrams. This simplifies PCB layout and reduces pin count, making the TMS320F2811PBKA optimal for self-contained control applications relying solely on its 128K flash and 18K SARAM.

How many PWM outputs and capture/QEP channels does the TMS320F2811PBKA support?

The TMS320F2811PBKA supports 16 total PWM outputs and 12 capture/QEP channels via its dual Event Managers (EVA and EVB). Each Event Manager provides 8 PWM outputs, 6 capture inputs, and 2 QEP decoder inputs - enabling full-bridge gate drive control and high-resolution position feedback for PMSM, induction, and BLDC motors. All PWM and capture resources are accessible on the 128-pin PBK package with no functional reduction versus larger variants.

What level of code security does the TMS320F2811PBKA provide, and how is it implemented?

The TMS320F2811PBKA implements a 128-bit code-security module that protects flash, OTP ROM, and L0/L1 SARAM from unauthorized read access. Security is enforced through hardware lock bits and key comparison logic - once enabled, debug access and memory reads are blocked unless the correct 128-bit key is loaded. This prevents firmware reverse-engineering and ensures intellectual property protection in production motor control systems using the TMS320F2811PBKA.

Which communication interfaces are integrated into the TMS320F2811PBKA?

The TMS320F2811PBKA integrates eCAN 2.0B, two Serial Communications Interfaces (SCIs) compatible with standard UART protocols, one Serial Peripheral Interface (SPI), and one Multichannel Buffered Serial Port (McBSP). These interfaces support industrial networking (CAN), host diagnostics (SCI), sensor/data acquisition (SPI), and audio or high-speed serial data transfer (McBSP) - all accessible within the 128-pin PBK package without multiplexing conflicts.