Texas Instruments LF2402APGA-GREE

Overview

LF2402APGA-GREE 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 (25-ns instruction cycle), features 8-channel 10-bit ADC with 500-ns minimum conversion time, single Event Manager (EVA) with 6 PWM outputs and 3 capture units, and operates on a 3.3-V supply. It targets brushless DC and stepper motor drives in industrial inverters.

For engineers reviewing the LF2402APGA-GREE datasheet, LF2402APGA-GREE pinout, LF2402APGA-GREE application, or LF2402APGA-GREE equivalent, key selection criteria include its 64-pin QFP package, flash-based 8K-word program memory, dual-access RAM architecture, and integrated motor-control peripherals - all validated for real-time embedded motion control systems requiring deterministic timing and analog integration.

Technical Context

The LF2402APGA-GREE implements a static CMOS C2xx DSP core with instruction-set compatibility to TMS320F240/F241/C242 devices. Its Event Manager A provides hardware-accelerated PWM generation with programmable deadband, synchronized ADC triggering, and input qualifier circuitry on CAPx pins to suppress noise-induced false triggers.

It integrates a PLL-based clock module supporting 40-MHz operation, JTAG-compliant scan-based emulation per IEEE 1149.1 (boundary scan not supported), and three power-down modes for low-power operation. The device lacks CAN and external memory interface - distinguishing it from LF2407A/LF2406A variants - and uses only one event manager for cost-optimized single-motor control.

Key Specifications

Pinout & Package

LF2402APGA-GREE is housed in a 64-pin QFP (PG) package with 0.8-mm lead pitch. Power and ground pins are distributed across corners and edges to minimize noise coupling; analog supply (VCCA/VSSA) and reference (VREFHI/VREFLO) are isolated per design guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LF2402APGA-GREE, LF2403A offers greater memory and dual-EV capability for scalable designs, while LC2402A trades reprogrammability for lower unit cost in mature, unchanging applications - both retain identical 64-pin QFP packaging and motor-control peripheral architecture.

Availability

LF2402APGA-GREE is available at Aetrix Electronics and suitable for industrial motor drives, appliance control boards, and HVAC blower modules requiring stable component supply across multi-year production lifecycles.

Supply support for LF2402APGA-GREE 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 silicon.

The TMS320LF240xA family was engineered specifically for cost-sensitive, high-reliability digital motor control - integrating event managers, precision ADCs, and real-time debug capabilities into a single chip to replace discrete MCU + peripheral combinations.

FAQ

What is the maximum PWM frequency supported by LF2402APGA-GREE?

The LF2402APGA-GREE supports PWM frequencies up to 20 kHz using its Event Manager A timers and 40-MHz system clock. With 16-bit resolution and programmable period registers, it achieves fine-grained duty-cycle control down to 0.0015% steps at 20 kHz - sufficient for high-fidelity sinusoidal commutation in BLDC drives. The actual achievable frequency depends on deadband insertion and interrupt latency, both fully hardware-managed within the LF2402APGA-GREE.

Does LF2402APGA-GREE support CAN communication?

No, LF2402APGA-GREE does not include a CAN module. CAN is present only in LF2407A, LF2406A, and LF2403A variants. The LF2402APGA-GREE provides SCI (asynchronous UART) and optional SPI (on select pins, though not enabled in this variant per datasheet Table 1) for serial communication - making it suitable for point-to-point or master-slave topologies where CAN bus redundancy is not required.

How is code security implemented on LF2402APGA-GREE?

LF2402APGA-GREE implements password-based code security for its on-chip 8K-word Flash memory. Once enabled, the security mechanism blocks external read access to Flash contents via JTAG or SCI bootloader, preventing firmware reverse engineering. The password is stored in dedicated security registers and persists through power cycles; unlocking requires correct password entry via TI's Code Composer Studio or compatible tools - a feature confirmed in SPRS145L Section 4 and Table 1.

What is the role of the PDPINTA pin on LF2402APGA-GREE?

The PDPINTA pin on LF2402APGA-GREE is a dedicated falling-edge-triggered interrupt input that forces all Event Manager A PWM outputs into high-impedance state within 2 µs. It is wired to overcurrent comparators in motor gate driver circuits and serves as the primary hardware-level protection against shoot-through, short-circuit, or thermal faults - a critical safety function validated in TMS320x240xA datasheet Section 4.5 and Figure 6.

Can LF2402APGA-GREE operate without an external crystal?

Yes, LF2402APGA-GREE can operate using an external clock source applied to the XTAL1/CLKIN pin, bypassing the internal oscillator circuit. While a crystal (typically 10 MHz) is recommended for stable PLL operation, the device accepts TTL/CMOS-compatible clock inputs from oscillators or other system clocks. The PLL then multiplies this input to generate the internal 40-MHz CPU clock - a configuration explicitly supported in SPRS145L Section 5.7 and functional block diagram on page 6.