Texas Instruments TMS320LF2401AVFA

Overview

TMS320LF2401AVFA from Texas Instruments is a 32-bit fixed-point DSP controller based on the TMS320C2xx CPU core, designed for real-time digital motor control. It delivers 40 MIPS at 40 MHz with 25-ns instruction cycle time, integrates 8K words of on-chip Flash EEPROM (4K/4K sectors), 544 words of dual-access RAM, and a dedicated Event Manager A module with 7 PWM channels and 1 capture input. It operates at 3.3 V and supports −40°C to 85°C extended temperature range.

For engineers reviewing the TMS320LF2401AVFA datasheet, TMS320LF2401AVFA pinout, TMS320LF2401AVFA application, or TMS320LF2401AVFA equivalent, this page provides verified functional architecture, validated peripheral timing, confirmed Flash security implementation, and precise GPIO/PWM multiplexing behavior per TI SPRS161K Rev. July 2007.

Technical Context

The TMS320LF2401AVFA implements a static CMOS C2xx DSP core with IEEE 1149.1 JTAG scan-based emulation (non-boundary-scan), PLL-based clock generation, and a single-event-manager (EVA) subsystem optimized for motor drive timing control. Its EVA includes two 16-bit general-purpose timers, programmable deadband logic for shoot-through prevention, and synchronized ADC triggering via ADCSOC.

It features a 10-bit ADC with five analog inputs (ADCIN00–ADCIN04), 500 ns minimum conversion time, and twin 8-state autosequencers triggered by EVA events. All 13 GPIOs are multiplexed with peripherals including SCI, JTAG, PDPINTA, XINT1/XINT2, and CLKOUT - with reset-default functions explicitly defined in TI's terminal functions table.

Key Specifications

Pinout & Package

32-pin VF low-profile quad flatpack (LQFP), 7 mm × 7 mm body, 0.5-mm pitch. Pin 26 is VCCP (5 V) for Flash programming on LF2401A; NC on LC2401A. Analog and digital supplies must be isolated per TI design guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TMS320LC2401AVFA, the TMS320LF2401AVFA enables secure in-field firmware updates via its boot ROM and Flash memory, while the TMS320LF2402APGE extends real-time I/O capability for higher channel-count motor systems - neither offers CAN or SPI, confirming LF2401A's role as a cost-optimized, Flash-based entry point in the C24x family.

Availability

TMS320LF2401AVFA is available at Aetrix Electronics and suitable for brushless DC motor drives, AC induction VFDs, stepper positioning systems, and switched reluctance actuator control requiring stable component supply and long-term industrial lifecycle support.

Supply support for TMS320LF2401AVFA 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 decades of expertise in motor control ICs and DSP architectures.

The TMS320C2000™ platform - including the TMS320LF2401AVFA - was engineered specifically for real-time digital power conversion and motion control, integrating event managers, high-speed ADCs, and robust PWM subsystems into a single chip.

FAQ

What is the Flash memory configuration of the TMS320LF2401AVFA?

The TMS320LF2401AVFA contains 8K words × 16 bits of on-chip Flash EEPROM organized in two 4K-word sectors. This allows independent erase/write operations per sector and supports password-based code-security locking to prevent unauthorized access to stored firmware. The Flash is reprogrammable in-system via the integrated SCI bootloader or JTAG interface.

Does the TMS320LF2401AVFA support CAN or SPI communication?

No, the TMS320LF2401AVFA does not include CAN or SPI peripherals. As explicitly stated in the device summary (SPRS161K, p.4), "peripherals such as SPI and CAN are absent on the Lx2401A." It provides only a single asynchronous SCI (UART) interface for serial communication, alongside JTAG for emulation and debugging.

How does the PDPINTA function work on the TMS320LF2401AVFA?

The PDPINTA input (Pin 32) triggers immediate hardware-level shutdown of all seven PWM outputs, forcing them into high-impedance state regardless of CPU activity. This emergency response occurs within one instruction cycle and remains active until cleared by software. During reset, PDPINTA is enabled by default and must be explicitly disabled via EVAIMRA register bit 0 if GPIO use is intended.

What is the role of the VCCP pin on the TMS320LF2401AVFA?

Pin 26 (VCCP) supplies 5 V exclusively during Flash programming operations on the TMS320LF2401AVFA. It is unconnected (NC) on ROM variants like LC2401A. During normal operation, VCCP may be tied to GND or left connected to 5 V - but must never float. No current-limiting resistor is permitted on this pin, as specified in TI's terminal functions documentation.

Can the TMS320LF2401AVFA operate without an external crystal?

Yes, the TMS320LF2401AVFA supports external clock input via XTAL1/CLKIN (Pin 6), allowing direct connection to a system clock oscillator instead of a crystal. The internal PLL multiplies this input to generate the 40-MHz CPU clock. XTAL2 (Pin 7) is left unconnected in clock-input mode, per TI's recommended configuration in SPRS161K Section 4.6.