DSPIC33FJ128GP306AT-I/PT Microchip dsPIC33F 16-Bit Digital Signal Controller 40MIPS 128KB Flash DMA Gen. PWM ADC TQFP-64 Tape Reel

DSPIC33FJ128GP306AT-I/PT Product Overview

The DSPIC33FJ128GP306AT-I/PT is a Microchip enhanced general-purpose 16-bit Digital Signal Controller (DSC) in a 64-lead TQFP package supplied on tape and reel, designed for complex 3.3V embedded control applications requiring large memory, DMA high-speed data transfer, and rich peripherals—especially suited for automated high-volume production. Based on the dsPIC33F core running at 40 MIPS, the DSPIC33FJ128GP306AT-I/PT integrates 128KB Flash and 16KB SRAM, along with a 4-channel DMA controller that automatically transfers data between peripherals and memory without CPU intervention, significantly boosting system throughput. On-chip peripherals of the DSPIC33FJ128GP306AT-I/PT include five 16-bit timers, four input captures, four output compares/PWM, a 10-bit ADC (up to 1.1 Msps, up to 16 analog input channels), and four analog comparators. Communication interfaces on the DSPIC33FJ128GP306AT-I/PT provide 2× UART, 2× SPI, and 2× I2C, all with Peripheral Pin Select (PPS) for flexible digital pin mapping. Operating from 3.0V to 3.6V with an industrial temperature range of -40°C to +85°C, in a TQFP-64 package, the DSPIC33FJ128GP306AT-I/PT suits industrial automation, instrumentation, communication gateways, and high-end consumer electronics that require DMA-assisted data acquisition, multi-protocol conversion, complex signal processing, and large memory.

DSPIC33FJ128GP306AT-I/PT Core Features

Processor Core: The DSPIC33FJ128GP306AT-I/PT features a 16-bit dsPIC33F core, 40 MIPS, DSP-enhanced instruction set

Program Memory: The DSPIC33FJ128GP306AT-I/PT provides 128KB Flash

Data Memory: The DSPIC33FJ128GP306AT-I/PT includes 16KB SRAM

DMA Controller: The DSPIC33FJ128GP306AT-I/PT integrates a 4-channel DMA for high-speed peripheral-to-RAM, RAM-to-peripheral transfers

Timers & Signal Processing: The DSPIC33FJ128GP306AT-I/PT offers 5× 16-bit timers, 4× input capture, 4× output compare/PWM

Analog Front-End: The DSPIC33FJ128GP306AT-I/PT features a 10-bit ADC (1.1 Msps, up to 16 channels), 4 analog comparators

Communication Interfaces: The DSPIC33FJ128GP306AT-I/PT provides 2× UART, 2× SPI, 2× I2C, with Peripheral Pin Select (PPS)

System Management: The DSPIC33FJ128GP306AT-I/PT contains a watchdog timer, BOR/POR, on-chip oscillator, hardware CRC

General Purpose I/O: The DSPIC33FJ128GP306AT-I/PT delivers up to 53 programmable I/O pins

Power & Package: The DSPIC33FJ128GP306AT-I/PT operates from 3.0V – 3.6V, in a TQFP-64 package, industrial -40°C to +85°C, tape and reel

DSPIC33FJ128GP306AT-I/PT Applications

Industrial Automation: The DSPIC33FJ128GP306AT-I/PT is ideal for sensor concentrators with DMA-driven continuous acquisition, process controllers, distributed I/O modules

Communication Protocol Conversion: The DSPIC33FJ128GP306AT-I/PT serves as multi-UART/SPI/I2C bridges, industrial Ethernet gateway co-processors

Digital Signal Processing: The DSPIC33FJ128GP306AT-I/PT is suitable for real-time audio processing, digital filtering, FFT analysis, software-defined radio front-ends

General Complex Real-Time Control: The DSPIC33FJ128GP306AT-I/PT excels in algorithm-intensive systems needing large memory, DMA, and multiple communication ports

DSPIC33FJ128GP306AT-I/PT Key Advantages

Tape & Reel for Volume Production: The “T” in the DSPIC33FJ128GP306AT-I/PT indicates tape and reel packaging, directly compatible with high-speed pick-and-place machines, boosting production efficiency for medium-to-high volume manufacturing.

DMA Frees CPU Bandwidth: The 4-channel DMA controller in the DSPIC33FJ128GP306AT-I/PT automatically moves data between ADCs, UARTs, SPIs, and SRAM without CPU intervention, drastically reducing interrupt overhead and increasing data throughput, allowing the 40 MIPS CPU to focus on core algorithms.

Massive Memory Footprint: The DSPIC33FJ128GP306AT-I/PT’s 128KB Flash and 16KB SRAM comfortably host complex DSP libraries, dual protocol stacks, and an RTOS, providing a solid foundation for long-term product evolution.

Enhanced Analog Front-End: The DSPIC33FJ128GP306AT-I/PT’s 16-channel 10-bit ADC paired with four analog comparators provides a complete single-chip solution for multi-sensor acquisition and fast fault response.

Flexible Signal Generation & Measurement: The DSPIC33FJ128GP306AT-I/PT’s four output compares/PWM generate multiple independent PWM signals; four input captures handle frequency/pulse-width measurement, meeting general control and simple motion control needs.

Dual Communication Ports + PPS: The DSPIC33FJ128GP306AT-I/PT’s 2× UART, 2× SPI, 2× I2C can all be flexibly remapped, serving as a multi-protocol communication hub while retaining a debug console.

Mature Development Toolchain: The DSPIC33FJ128GP306AT-I/PT is supported by free MPLAB X IDE and XC16 compiler, combined with MCC, DSP libraries, and peripheral libraries, enabling rapid progress from prototype verification to production.

Long-Term Availability: The DSPIC33FJ128GP306AT-I/PT is a mature dsPIC33F family product with stable long-term supply commitment.

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FAQ

1. What does the “AT” suffix in the part number mean?
   
   • A denotes the enhanced variant with a 4-channel DMA controller and more analog comparators.
   • T indicates tape and reel packaging, designed for automated high-speed pick-and-place machines.
   • The DSPIC33FJ128GP306AT-I/PT is silicon-identical to the DSPIC33FJ128GP306A-I/PT; only the packaging differs.
2. How should I choose between the tape-and-reel and tray versions during development?
   
   • During R&D and prototyping, tray or small-quantity reels are often used for easy manual handling and debugging of the DSPIC33FJ128GP306AT-I/PT.
   • When moving to volume production, switching to the tape-and-reel version of the DSPIC33FJ128GP306AT-I/PT seamlessly integrates with pick-and-place machines, reducing manual intervention and improving consistency.
   • The electrical performance of the DSPIC33FJ128GP306AT-I/PT is identical to the tray version, and they can be freely interchanged.
3. What specific benefits does DMA bring to real-world projects?
   
   • During continuous ADC sampling, the DMA in the DSPIC33FJ128GP306AT-I/PT automatically transfers results into SRAM buffers without CPU intervention, ideal for high-speed data logging and spectrum analysis.
   • For UART/SPI communication, the DSPIC33FJ128GP306AT-I/PT’s DMA can send/receive data in the background, leaving the CPU to process complete packets, significantly improving system responsiveness in multi-protocol conversion.
   • The DMA of the DSPIC33FJ128GP306AT-I/PT reduces the risk of data loss due to interrupt latency, enhancing real-time performance.
4. What does this chip add compared to the non-A GP306?
   
   • The DSPIC33FJ128GP306AT-I/PT adds a 4-channel DMA controller, enabling high-speed data transfers between peripherals and memory without loading the CPU.
   • The DSPIC33FJ128GP306AT-I/PT increases the number of analog comparators from 3 to 4, providing more resources for multi-channel fault protection.
   • Other peripherals such as timers, capture/compare, and communication interfaces remain largely consistent with the DSPIC33FJ128GP306AT-I/PT.
5. Can this chip run an RTOS?
   Absolutely. The DSPIC33FJ128GP306AT-I/PT’s 128KB Flash and 16KB SRAM provide ample program and data space for embedded real-time operating systems (e.g., FreeRTOS), and its DMA efficiently supports multi-tasking and peripheral management.
6. What data acquisition rate can the ADC achieve with DMA?
   The ADC of the DSPIC33FJ128GP306AT-I/PT samples at up to 1.1 Msps, and the DMA can automatically move each conversion result to SRAM for seamless continuous acquisition. Practical sustained throughput depends on DMA channel priority and bus bandwidth, but performance matching the sampling rate is achievable in most applications with the DSPIC33FJ128GP306AT-I/PT.
7. Can it be used to control motors?
   The four output compares on the DSPIC33FJ128GP306AT-I/PT can generate simple PWM signals suitable for driving brushed DC or stepper motors (with external drivers). The DSPIC33FJ128GP306AT-I/PT lacks complementary outputs and hardware dead-time insertion, making it unsuitable for directly driving 3-phase BLDC/PMSM motors. For dedicated motor control, the dsPIC33F MC series is recommended.
8. What development tools and software are supported?
   
   • Free MPLAB X IDE and MPLAB XC16 compiler for the DSPIC33FJ128GP306AT-I/PT.
   • Hardware debuggers: PICkit 4 or MPLAB ICD 4, supporting in-circuit programming and real-time debugging of the DSPIC33FJ128GP306AT-I/PT.
   • MPLAB Code Configurator (MCC) graphically generates DMA and peripheral drivers, significantly lowering the development difficulty for the DSPIC33FJ128GP306AT-I/PT.
9. What is the size and soldering process for the TQFP-64 package?
   
   • The DSPIC33FJ128GP306AT-I/PT comes in a 10mm×10mm package with 0.5mm pin pitch, classified as a medium-density QFP.
   • Standard reflow soldering processes achieve high yield with the DSPIC33FJ128GP306AT-I/PT. Hand soldering is also possible using flux and drag-soldering techniques.
10. What project stages is the DSPIC33FJ128GP306AT-I/PT suitable for?
    It is ideal for projects that have completed prototype verification and are moving into low-to-medium or high-volume production. Tape-and-reel packaging is highly compatible with automated pick-and-place machines, significantly improving production efficiency and ensuring consistent soldering quality, while the DSPIC33FJ128GP306AT-I/PT offers the same development experience and software ecosystem as the tray version.