TMS320F28335PGFA: A Comprehensive Analysis of a Digital Signal Controller

TMS320F28335PGFA is a high-performance digital signal controller (Digital Signal Controller, DSC) launched by Texas Instruments (TI), belonging to the Delfino™TMS320F28x series. It combines the efficient digital signal processing capabilities of a DSP and the control functions of an MCU, and is widely used in fields such as motor control, industrial automation, power electronics, and embedded real-time control systems.

Key Features

-Core: 32-bit TMS320C28x DSP with extended floating-point unit

-Clock Speed: Up to 150 MHz

-Floating Point Unit (FPU): Single-precision IEEE 754

-Flash Memory: 512 KB

-RAM: 68 KB

-PWM Modules: 6 enhanced PWM (ePWM) modules

Analog:

2×12-bit ADCs

16 total channels

2 MSPS conversion rate

-Communication Interfaces:

3×SPI

1×McBSP

2×SCI (UART)

1×CAN

1×I²C

-DMA Controller: 6-channel for high-speed data transfer

-Enhanced Capture (eCAP) and Quadrature Encoder (eQEP) modules for motor control

-Watchdog, GPIO, External Interrupts

Package Information

·Package Type: LQFP (Low-profile Quad Flat Package)

·Pin Count: 176 pins

·Package Code: PGFA

·Temperature Range: Typically -40°C to +105°C (industrial grade)

Absolute Maximum Ratings

Applications

•Advanced driver assistance systems (ADAS)

–Medium/short range radar

•Building automation

–HVAC motor control

–Traction inverter motor control

•Factory automation & control

–Automated sorting equipment

–CNC control

•Grid infrastructure

–Central inverter

–String inverter

•Hybrid, electric & powertrain systems

–Inverter & motor control

–On-board (OBC) & wireless charger

•Motor drives

–AC-input BLDC motor drive

–Servo drive control module

•Power delivery

–Industrial AC-DC

Advantages and Design Suggestions

Advantages:

1.High integration: DSP + MCU integrated

2.Fast processing speed: Supports up to 150 MHz operating frequency

3.Support for multiple peripherals: PWM, ADC, CAN, SPI, etc., suitable for various control applications

4.Rich software resources: TI provides comprehensive documentation and driver library support

Design Suggestions:

1.Properly configure the clock tree and peripheral pins to avoid conflicts.

2.Utilize the synchronous mechanism of ePWM and ADC to achieve precise control.

3.Enable DMA to improve data acquisition and processing efficiency. For applications involving4.high current control, it is recommended to use the combination of eCAP/eQEP and closed-loop control algorithms (such as PID/PI/FOC).

Conclusion

TMS320F28335PGFA is a highly mature and stable DSP controller, widely used in real-time control systems with high response requirements and high computational intensity. With its powerful performance and rich peripherals, it is an ideal choice for industrial-grade embedded control systems. For developers, excellent documentation support and development ecosystem greatly simplify the product development cycle.