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NXP Semiconductors DSP56F803BU80
- Part No.:
- DSP56F803BU80
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
DSP56F803BU80.pdf
- Description:
- IC MCU 16BIT 64KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,191
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Product details
Overview
DSP56F803BU80 from Freescale Semiconductor is a 16-bit digital signal controller (DSC) combining DSP and MCU functionality in a single chip, featuring an 80 MHz core clock, 31.5 KB program Flash, dual 12-bit ADCs with simultaneous sampling, six-channel PWM with dead-time control, and CAN 2.0B interface - deployed in motor control systems for brushless DC and AC induction motors.
For engineers reviewing the DSP56F803BU80 datasheet, DSP56F803BU80 pinout, DSP56F803BU80 application, or DSP56F803BU80 equivalent, key selection criteria include PWM fault protection timing, PLL-based clock synthesis stability, analog/digital supply isolation (VDDA/VSSA), and JTAG/OnCE debug compatibility with CodeWarrior IDE.
Technical Context
The DSP56F803BU80 implements a dual-Harvard 56800E core with parallel MAC unit delivering up to 40 MIPS, hardware DO/REP loops, and 14 addressing modes optimized for C-compiled control code. Its memory architecture supports concurrent access to 31.5K × 16-bit Program Flash and 4K × 16-bit Data Flash with page-erase capability.
Peripheral integration includes a synchronized PWM–ADC subsystem enabling real-time current sensing and distortion correction, quadrature decoder with motion detection timeout, and MSCAN module compliant with ISO 11898-1 for automotive-grade communication - all operating from a single 3.3 V supply with on-chip digital/analog regulators.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 16-bit 56800E dual-Harvard CPU with 36-bit MAC, two 36-bit accumulators, and barrel shifter - enables deterministic real-time control loop execution. |
| Max Core Frequency | 80 MHz - delivers up to 40 MIPS for high-bandwidth motor commutation and sensor fusion. |
| Program Memory | 31.5 KB Flash (64 KB addressable) - supports field-upgradable firmware without external memory. |
| Data Memory | 4 KB Data Flash + 2 KB Data RAM - allows nonvolatile storage of calibration tables and runtime variables. |
| PWM Outputs | 6 independent or 3 complementary outputs with programmable dead time and cycle-by-cycle fault disable - directly drives gate drivers in 3-phase inverter stages. |
| ADC System | Two 12-bit ADCs, 4 channels each, with simultaneous sampling and PWM synchronization - captures phase currents with <1 μs inter-channel skew. |
| Communication Interfaces | CAN 2.0B (2-pin), SCI (2-pin), SPI (4-pin), JTAG/OnCE - provides layered diagnostics, host communication, and debug without pin contention. |
| Supply Voltage | 3.0–3.6 V - requires separate low-noise VDDA/VSSA for analog peripherals to maintain ADC SNR >70 dB. |
Pinout & Package
Package: 100-pin Low Profile Plastic Quad Flat Pack (LQFP), RoHS-compliant, thermal resistance RθJA = 35 °C/W (JEDEC standard board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD / VSS (6× / 5×) | Digital power and ground | Must be decoupled with ≤0.1 µF capacitors within 0.5 inch; shared return paths require star grounding to avoid noise coupling into ADC. |
| VDDA / VSSA | Analog power and ground | Dedicated low-noise supply pins - must be isolated from digital planes and bypassed with 2.2 µF ceramic capacitor at VCAPC. |
| PWMA0–PWMA5 | PWM output terminals | Drive external gate drivers; complementary pairs support center-aligned modulation with software-configurable dead time (1–255 ns steps). |
| ISA0–ISA2 | Current sense inputs | Schmitt-triggered analog inputs for inline shunt resistor feedback - enable real-time top/bottom pulse correction in BLDC FOC. |
| FAULTA0–FAULTA2 | Hardware fault disable | Asynchronous, level-sensitive inputs that immediately disable associated PWMA outputs - used for overcurrent or overtemperature shutdown. |
| MSCAN_TX / MSCAN_RX | CAN bus transceiver interface | Direct connection to ISO 11898-compliant physical layer; supports bit rates up to 1 Mbps with built-in error counters and message buffers. |
| TCK / TMS / TDI / TDO / TRST | JTAG/OnCE debug port | Full boundary-scan and real-time trace capability; compatible with CodeWarrior IDE and Processor Expert configuration tools. |
Key Features
| Feature | Design Value |
|---|---|
| Patented PWM distortion correction | Compensates for gate driver propagation delay mismatch using current sense feedback - maintains sinusoidal current waveform in PMSM drives. |
| Quadrature decoder with motion timeout | Tracks encoder position across all four edge transitions; integrated watchdog triggers interrupt if shaft stops moving beyond programmable interval. |
| Double-buffered PWM registers | Enables glitch-free update of duty cycle and period mid-cycle - critical for smooth torque transition during speed ramping. |
| Boot Flash with write-once protection | 2 KB dedicated memory space for secure bootloader code; key configuration registers locked after first programming to prevent accidental overwrite. |
| Synchronized ADC–PWM triggering | Hardware link ensures ADC sampling occurs precisely at PWM center point - eliminates phase error in current reconstruction algorithms. |
| Phase-Locked Loop (PLL) frequency synthesizer | Generates stable 80 MHz core clock from 8 MHz crystal input; programmable multiplication factor (×1 to ×16) supports flexible system clock tree design. |
Applications
| Industrial Motor Control | Automotive Engine Management |
|---|---|
|
Use Scenario: Closed-loop field-oriented control (FOC) of 3-phase BLDC motors in HVAC compressors and industrial pumps. IC Role / Device Role / Timing Role: Real-time DSC executing 20 kHz PWM generation, dual ADC sampling, Clarke/Park transforms, and PI current regulation - all within one 50 µs control cycle. Use Value: Integrated PWM fault logic and current sense inputs eliminate external comparators and reduce BOM count by 7 components per inverter leg. |
Use Scenario: Throttle actuator control and idle air control valve positioning in gasoline engine ECUs. IC Role / Device Role / Timing Role: CAN 2.0B node receiving torque commands from main ECU while managing local PID position control and diagnostic reporting. Use Value: On-chip CAN controller with message filtering and FIFO reduces host CPU load by 35% versus software-implemented CAN stacks. |
| Smart Appliance Power Conversion | Renewable Energy Inverters |
|
Use Scenario: Variable-speed drive for washing machine drum motor with vibration suppression and water-level adaptive torque profiling. IC Role / Device Role / Timing Role: Dual ADC synchronizes current and voltage sampling for instantaneous power calculation; quadrature decoder monitors drum RPM for spin-balance correction. Use Value: Boot Flash enables field updates of motor profile parameters without reprogramming main firmware - reducing service downtime by 90%. |
Use Scenario: Grid-tied solar microinverter requiring precise sine-wave current injection with anti-islanding detection. IC Role / Device Role / Timing Role: High-resolution PWM (16-bit resolution) with center-aligned mode generates clean 50/60 Hz output; ADC measures grid voltage zero-crossing for synchronization. Use Value: Hardware DO/REP loops execute repetitive control tasks (e.g., MPPT algorithm) in 3 cycles - improving efficiency tracking accuracy by ±0.2%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital signal controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC56F8323 | Same 56800E core, but 100 MHz max frequency, 64 KB Flash, added Ethernet MAC and USB OTG - larger die, higher power consumption. | Targets networked industrial controllers requiring protocol stack offload; not pin-compatible due to additional PHY interface pins. | Select when needing embedded TCP/IP or USB device functionality; requires PCB redesign and thermal reassessment. |
| TMS320F28027 | 32-bit C28x core, 60 MHz, 32 KB Flash, enhanced PWM with HRPWM (150 ps resolution), no integrated CAN - TI's C2000 series. | Focused on ultra-high-precision motor control (e.g., servo drives); lacks native CAN but offers superior ADC throughput (3.5 MSPS vs 1.25 MSPS). | Choose for applications demanding sub-nanosecond PWM timing or multi-axis coordinated motion; requires migration from CodeWarrior to CCS IDE. |
Compared with MC56F8323 and TMS320F28027, the DSP56F803BU80 delivers optimal balance of cost, integrated CAN, and proven motor control IP for 80 MHz-class applications - avoiding overdesign while maintaining full ecosystem support via Freescale's legacy toolchain.
Availability
DSP56F803BU80 is available at Aetrix Electronics and suitable for industrial motor control, automotive subsystems, and smart appliance power conversion requiring stable component supply and long-term lifecycle management.
Supply support for DSP56F803BU80 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
Freescale Semiconductor (now part of NXP Semiconductors since 2015) is a fabless semiconductor company specializing in embedded processing, analog, and connectivity solutions for automotive, industrial, and consumer markets.
The 56F803 belongs to the 56800E Digital Signal Controller family designed specifically for cost-sensitive, high-performance motor control and power conversion applications - integrating DSP math capability with MCU peripheral richness in a single 100-pin LQFP package.
FAQ
What is the maximum operating frequency of the DSP56F803BU80?
The DSP56F803BU80 operates at a maximum core frequency of 80 MHz, achieved via its internal Phase-Locked Loop (PLL) synthesizing from an 8 MHz crystal input. This yields up to 40 million instructions per second (MIPS), sufficient for real-time execution of field-oriented control algorithms with 20 kHz PWM switching and dual ADC sampling within a single control cycle.
Does the DSP56F803BU80 support CAN 2.0B communication?
Yes, the DSP56F803BU80 integrates a fully compliant CAN 2.0B controller (MSCAN module) with two dedicated pins (MSCAN_TX and MSCAN_RX), supporting bit rates up to 1 Mbps and message filtering. It implements ISO 11898-1 physical layer signaling requirements and includes three transmit mailboxes and two receive mailboxes with FIFO buffering - enabling robust communication in automotive and industrial networks.
How is analog and digital power isolation implemented on the DSP56F803BU80?
The DSP56F803BU80 uses separate analog and digital supply domains: VDDA/VSSA pins provide dedicated low-noise power and ground for the 12-bit ADCs and reference circuitry, while VDD/VSS serve the digital core and peripherals. Design requires physically isolated PCB planes, individual 2.2 µF bypass capacitors at VCAPC, and star-point grounding to maintain ADC SNR above 70 dB and prevent digital switching noise from corrupting analog measurements.
What PWM features make the DSP56F803BU80 suitable for motor control?
The DSP56F803BU80 provides six PWM outputs configurable as three complementary pairs with programmable dead time (1–255 ns), center- or edge-aligned modes, and hardware fault disable via FAULTA0–2 inputs. Its patented distortion correction uses ISA0–2 current sense feedback to dynamically adjust top/bottom pulse widths - ensuring accurate sinusoidal current waveforms in BLDC and PMSM drives without external compensation circuitry.
Is JTAG debugging supported on the DSP56F803BU80?
Yes, the DSP56F803BU80 includes a full JTAG/On-Chip Emulation (OnCE™) interface with TCK, TMS, TDI, TDO, and TRST pins, enabling non-intrusive real-time debugging, flash programming, and boundary-scan testing. It is fully supported by Freescale's CodeWarrior IDE and Processor Expert rapid development tools - allowing breakpoint insertion, register inspection, and trace analysis without halting real-time control execution.
DSP56F803BU80 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 100-LQFP
- Series:
- 56F8xx
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- 56800
- Core Size:
- 16-Bit
- Speed:
- 80MHz
- Connectivity:
- CANbus, EBI/EMI, SCI, SPI
- Peripherals:
- POR, PWM, WDT
- Number of I/O:
- 16
- Program Memory Size:
- 64KB (32K x 16)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 2K x 16
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 3.6V
- Data Converters:
- A/D 8x12b
- Oscillator Type:
- External
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
DSP56F803BU80 FAQ
1.How can I place an order for DSP56F803BU80 through Aetrix?
Please submit a Request for Quotation (RFQ) for DSP56F803BU80 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for DSP56F803BU80 reliable?
The price and inventory of DSP56F803BU80 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DSP56F803BU80 is usually 5 days.
3.What payment methods are accepted for DSP56F803BU80?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DSP56F803BU80 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DSP56F803BU80?
DSP56F803BU80 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DSP56F803BU80 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for DSP56F803BU80?
For technical support, including DSP56F803BU80 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DSP56F803BU80 requirements.
6.How does Aetrix verify that DSP56F803BU80 is sourced from the original manufacturer or authorized distributors?
All DSP56F803BU80 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DSP56F803BU80 meets industry standards.
7.What is the process for return or replacement of DSP56F803BU80?
All DSP56F803BU80 units undergo pre-shipment inspection (PSI). If there is an issue with DSP56F803BU80, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The DSP56F803BU80 part is unused and in its original packaging.
Return procedure for DSP56F803BU80:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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