Texas Instruments TMS320LF2401AVFS

Overview

TMS320LF2401AVFS from Texas Instruments is a 32-bit fixed-point DSP controller based on the TMS320C2xx CPU core, designed for digital motor control. It delivers 40 MIPS at 40 MHz with 25-ns instruction cycle time, integrates 8K words of on-chip Flash EEPROM (2-sector), 544 words of dual-access RAM, and a dedicated Event Manager A module supporting seven PWM channels, emergency shutdown via PDPINTA, and synchronized 10-bit ADC for AC induction and BLDC motor drives.

For engineers reviewing the TMS320LF2401AVFS datasheet, TMS320LF2401AVFS pinout, TMS320LF2401AVFS application, or TMS320LF2401AVFS equivalent, key selection criteria include Flash-based reprogrammability, 32-pin VF LQFP package compatibility, 5-channel 500 ns ADC timing, PLL clock generation, and JTAG-compliant real-time emulation support in space-constrained industrial motion control designs.

Technical Context

The TMS320LF2401AVFS implements a static CMOS C2xx DSP core with code compatibility to TMS320F240 and instruction-set compatibility with F240, enabling migration from legacy 240x controllers. Its Event Manager A module provides two 16-bit general-purpose timers, one capture unit (CAP1), programmable deadband for shoot-through prevention, and input qualifier circuitry on critical pins including PDPINTA and XINT1/2.

It features a 10-bit ADC with twin 8-state autosequencers triggered by EV events, minimum 500 ns conversion time, and five multiplexed analog inputs (ADCIN00–ADCIN04). The device supports three low-power modes, independent peripheral power-down, and PLL-based clock generation with external crystal or oscillator options - all operating from a single 3.3-V core supply.

Key Specifications

Pinout & Package

32-pin VF Low-Profile Quad Flatpack (LQFP), 7 mm × 7 mm body, 0.5 mm pitch. Pin 1 marked with dot; top view shown in datasheet Figure 8. VCCP (Pin 26) supplies 5 V during Flash programming only and is unused in normal operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TMS320LF2401AVFS, the LC2401AVFS eliminates Flash programming overhead but sacrifices field upgradeability, while the LF2402APG expands peripheral capability at the cost of larger footprint and non-compatible packaging - making TMS320LF2401AVFS optimal for compact, Flash-based, single-motor control where pin count and board area are constrained.

Availability

TMS320LF2401AVFS is available at Aetrix Electronics and suitable for industrial motor drives, embedded power converters, and motion control modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TMS320LF2401AVFS 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 over 50 years of innovation in industrial and automotive electronics.

The TMS320C2000™ platform - to which TMS320LF2401AVFS belongs - was engineered specifically for real-time digital control of motors, power converters, and sensors, emphasizing deterministic timing, integrated peripherals, and low-latency signal processing.

FAQ

What is the Flash memory configuration of the TMS320LF2401AVFS?

The TMS320LF2401AVFS contains 8K words × 16 bits of on-chip Flash EEPROM organized in two 4K-word sectors. This allows independent erase/program operations per sector, enabling safe firmware updates without disrupting active control code. The Flash supports password-based code security to prevent unauthorized access, and a 256-word boot ROM facilitates in-circuit programming without external tools. The TMS320LF2401AVFS requires VCCP = 5 V only during Flash programming cycles.

How does the PDPINTA pin function in the TMS320LF2401AVFS?

The PDPINTA pin (Pin 32) on the TMS320LF2401AVFS serves as a hardware-level power drive protection input. When pulled low, it immediately forces all six PWM outputs into high-impedance state - independent of CPU execution or reset state. This feature enables fail-safe shutdown of inverter stages during overcurrent or thermal faults. The TMS320LF2401AVFS retains this behavior even in low-power mode LPM2, provided the pin is held low for (98304 CLKIN + 12 CLKOUT) cycles to ensure reliable wake-up and response.

Can the TMS320LF2401AVFS support synchronous ADC sampling with PWM events?

Yes, the TMS320LF2401AVFS supports hardware-synchronized ADC sampling via its Event Manager A module. The ADCSOC (ADC Start of Conversion) signal can be generated automatically by EVA timers or compare events, triggering conversions precisely aligned with PWM center/edge points. This synchronization - combined with the 500 ns minimum conversion time and twin 8-state autosequencers - enables accurate current sensing in motor phase legs without CPU intervention, a critical capability for field-oriented control implemented on the TMS320LF2401AVFS.

What are the JTAG pin constraints during emulation with the TMS320LF2401AVFS?

During JTAG emulation, the TMS320LF2401AVFS disables GPIO functionality on pins TCK/IOPB1 (Pin 4), TDO/IOPB2 (Pin 23), TDI/OPB5 (Pin 24), TMS/XF (Pin 1), and TRST (Pin 20). These pins are reserved exclusively for debugger communication and must not be loaded with external circuitry that could interfere with JTAG signaling. The TMS320LF2401AVFS requires TRST to be held low during normal operation; floating TRST is acceptable only in low-noise environments, otherwise a 2.2-kΩ external pulldown is recommended.

Is the TMS320LF2401AVFS pin-compatible with other TMS320x240xA devices?

The TMS320LF2401AVFS shares the same 32-pin VF LQFP package and pinout with the TMS320LC2401AVFS, enabling direct PCB substitution between Flash and ROM variants. However, it is not pin-compatible with 64-pin devices like the TMS320LF2402APG due to differing package size and expanded peripheral routing. While functionally compatible with earlier TMS320F240 devices at the instruction-set level, the TMS320LF2401AVFS lacks SPI and CAN interfaces present in those parts - confirming strict 32-pin VF family compatibility only.