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NXP Semiconductors MC56F8256VLF
- Part No.:
- MC56F8256VLF
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
MC56F8256VLF.pdf
- Description:
- IC MCU 16BIT 64KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,678
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Product details
Overview
MC56F8256VLF from NXP Semiconductors (formerly Freescale) is a 60 MHz digital signal controller (DSC) built on the 56800E core, integrating DSP processing power and microcontroller functionality. It features 64 KB flash, 8 KB RAM, dual 12-bit ADCs with ×4 programmable gain, six-channel NanoEdge PWM (520 ps resolution), and MSCAN 2.0A/B interface. It is deployed in PMSM servo motor control systems requiring real-time current loop execution and fault-protected PWM generation.
For engineers reviewing the MC56F8256VLF datasheet, MC56F8256VLF pinout, MC56F8256VLF application, or MC56F8256VLF equivalent, key selection criteria include eFlexPWM channel count with input capture, 12-bit ADC conversion time (600 ns), CAN 2.0B compliance, operating temperature range (–40 °C to +105 °C), and LQFP-48 package compatibility for industrial motor drive layouts.
Technical Context
The MC56F8256VLF implements a dual-Harvard 56800E core delivering up to 60 MIPS, with three parallel execution units enabling six operations per instruction cycle. Its architecture supports efficient C compilation and unified memory addressing for both program and data.
Peripherals are interconnected via an inter-module crossbar (XBAR), enabling flexible routing of ADC triggers to eFlexPWM, comparator outputs to timer inputs, and fault signals to PWM shutdown logic - critical for fast-loop motor control and digital power supply regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | 56800E DSP/MCU hybrid core, 60 MHz operation → enables deterministic 600 ns ADC sampling + PWM update within single control loop. |
| Flash / RAM | 64 KB flash (32K × 16), 8 KB RAM (4K × 16) → sufficient for field-oriented control (FOC) algorithms with sensorless estimation and communication stacks. |
| eFlexPWM | 9-channel module with 6× NanoEdge (520 ps edge placement) + 3× input capture → supports high-resolution BLDC commutation and hardware-based overcurrent response. |
| ADC | Dual 12-bit ADCs, 8-channel each, ×4 programmable gain, 600 ns conversion → allows simultaneous phase current and DC-bus voltage sampling with analog front-end amplification. |
| CAN Interface | MSCAN 2.0A/B compliant, up to 1 Mbps → enables real-time command/control messaging in distributed motor drive systems. |
| Operating Range | –40 °C to +105 °C ambient, 3.0–3.6 V supply → qualified for under-hood industrial inverters and HVAC blower drives. |
| Package | 48-pin LQFP (VLF suffix), 7 mm × 7 mm, 0.5 mm pitch → compatible with standard PCB assembly and thermal pad grounding for motor control EMI mitigation. |
Pinout & Package
MC56F8256VLF is housed in a 48-pin LQFP (VLF) package with exposed thermal pad. Pin functions are defined by configuration registers and crossbar mapping; primary I/O includes dedicated ADC inputs, eFlexPWM outputs, CANH/CANL, QSCI/QSPI/I²C serial pins, and GPIOs supporting 5 V tolerance and configurable pull-up/pull-down.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual 3.3 V domains: digital core and analog subsystem require separate decoupling; thermal pad must be soldered to PCB ground plane. |
| XTAL/EXTAL | Clock input/output | Supports external crystal (4–8 MHz) or ceramic resonator; PLL locks to generate 60 MHz core clock and 120 MHz peripheral clock. |
| PWM0A–PWM3B | eFlexPWM complementary outputs | Four independent complementary pairs (8 pins); each pair supports independent deadtime, frequency, and forced shutdown via fault inputs. |
| AD0–AD15 | Analog input channels | 16 total ADC inputs shared across two 8-channel converters; routed via XBAR to trigger PWM reload or initiate comparator-driven protection. |
| CANH/CANL | CAN bus differential pair | Direct connection to ISO 11898-compliant transceiver; supports dominant/recessive state detection and automatic retransmission on error. |
| SCI0_TX/SCI0_RX | QSCI serial interface | LIN slave-capable UART with 4-byte FIFO; used for parameter upload, firmware updates, or host diagnostics in appliance control systems. |
Key Features
| Feature | Design Value |
|---|---|
| NanoEdge PWM resolution | 520 ps edge placement precision enables sub-microsecond timing control for SiC/GaN gate drivers in high-frequency inverters. |
| Inter-module crossbar (XBAR) | Programmable internal routing between ADC, eFlexPWM, timers, and comparators eliminates fixed signal path constraints and reduces software overhead. |
| Three analog comparators | Each with integrated 5-bit DAC reference and output routable to PWM fault inputs → enables hardware-level overcurrent trip without CPU intervention. |
| Dual 12-bit ADCs with gain | Simultaneous sampling with ×4 programmable gain allows direct connection of shunt resistors (e.g., 5 mΩ) without external op-amps in motor phase current sensing. |
| MSCAN 2.0B compliance | Full CAN protocol support including extended frames and bit rates up to 1 Mbps → interoperable with industrial PLC networks and automotive body control modules. |
Applications
| Industrial Motor Drives | Digital Power Supplies |
|---|---|
Use Scenario: Closed-loop vector control of 3-phase PMSM in HVAC compressors with encoder feedback and DC-link voltage regulation. IC Role / Device Role / Timing Role: Real-time execution of FOC algorithm, synchronized ADC sampling, and NanoEdge PWM generation with <1 µs jitter. Use Value: Enables >95% efficiency at partial load and smooth torque delivery down to 0.5 Hz via 60 MHz deterministic processing and hardware-accelerated math units. | Use Scenario: Phase-shifted full-bridge DC-DC converter in telecom rectifiers requiring adaptive deadtime control and input/output monitoring. IC Role / Device Role / Timing Role: Primary controller managing PWM duty cycle, soft-start sequencing, and overvoltage/overcurrent protection using analog comparators and CRC-checked telemetry. Use Value: Reduces component count by integrating ADC, DAC, CAN, and high-res PWM - eliminating external signal conditioners and discrete protection logic. |
| Home Appliance Inverters | Battery Management Systems |
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: Sensorless rotor position estimation using back-EMF integration, ADC-triggered PWM modulation, and LIN communication to main MCU. Use Value: Achieves <30 dB acoustic noise reduction through precise 16-bit PWM edge control and real-time current harmonic cancellation. | Use Scenario: Cell-balancing and state-of-charge estimation in 12S Li-ion battery packs for cordless power tools. IC Role / Device Role / Timing Role: Simultaneous cell voltage measurement via ADC, temperature monitoring via analog comparators, and CAN-based pack status reporting. Use Value: Supports ±1 mV cell voltage accuracy and <2 ms fault response time using hardware comparator-to-PWM fault linkage - preventing thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital signal controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC56F8257VLF | Same 64 KB flash/8 KB RAM, but adds 3-channel eFlexPWM input capture (vs. 0 on MC56F8256VLF) and 54 GPIOs (vs. 39). | Preferred for multi-sensor servo systems requiring quadrature encoder + analog current feedback + temperature monitoring on single chip. | Select MC56F8257VLF when input capture on ≥3 PWM channels is required for position/speed acquisition without external logic. |
| MC56F8247VLF | 48 KB flash/8 KB RAM, same 6-channel NanoEdge PWM, but no MSCAN; operates at 60 MHz with identical peripherals except CAN and QSPI. | Suitable for cost-sensitive ACIM drives where CAN is replaced by UART-based HMI or local control only. | Choose MC56F8247VLF when CAN interface is unnecessary and flash budget is constrained to ≤48 KB for basic motor control firmware. |
Compared with MC56F8256VLF, MC56F8257VLF adds input capture capability essential for encoder-based motion control, while MC56F8247VLF removes CAN and reduces flash - making it viable only where communication is limited to QSCI/LIN and code size is under 48 KB.
Availability
MC56F8256VLF is available at Aetrix Electronics and suitable for industrial motor drives, digital power supplies, home appliance inverters, and battery management systems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for MC56F8256VLF 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
NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with roots in Freescale's DSC heritage.
The MC56F8256VLF belongs to the 56800E-based DSC product line, designed specifically for cost-sensitive, high-performance motor control and digital power conversion where DSP-level math acceleration and microcontroller flexibility are jointly required.
FAQ
What is the maximum ADC conversion rate supported by the MC56F8256VLF?
The MC56F8256VLF supports a maximum ADC clock frequency of 10 MHz, achieving a single conversion time of 850 ns and additional conversions in 600 ns. This enables up to 1.18 million samples per second per ADC module when operating in sequential scan mode with minimal overhead, sufficient for 20 kHz current loop execution in PMSM drives. The MC56F8256VLF ADCs are synchronized to eFlexPWM events via the crossbar to ensure deterministic sampling timing.
Does the MC56F8256VLF support CAN FD or only classical CAN 2.0?
The MC56F8256VLF integrates the MSCAN 2.0A/B module, which is fully compliant with ISO 11898-1:2003 (CAN 2.0B) but does not support CAN FD features such as flexible data-rate, extended data length, or CRC-21. It operates at up to 1 Mbps with standard and extended identifier frames. For CAN FD requirements, designers must select newer NXP S32K or LPC55xx families - the MC56F8256VLF is intended for legacy industrial networks and cost-optimized implementations where classical CAN suffices.
How many independent PWM channels with NanoEdge resolution does the MC56F8256VLF provide?
The MC56F8256VLF provides six independent PWM channels with NanoEdge resolution (520 ps edge placement), implemented within its eFlexPWM module. These six channels are distributed across complementary pairs and support fractional delay for enhanced period and phase control. While the eFlexPWM module supports up to nine total outputs, only six are equipped with NanoEdge capability; the remaining three support standard 16-bit resolution and input capture - a distinction confirmed in Table 1 of the MC56F825XPB datasheet for the MC56F8256 variant.
Is the MC56F8256VLF pin-compatible with other members of the MC56F825x family?
The MC56F8256VLF uses a 48-pin LQFP (VLF) package, matching the pinout of MC56F8255VLF and MC56F8257VLF in the same package variant. However, functional pin assignments differ: MC56F8255VLF lacks input capture on eFlexPWM channels, and MC56F8257VLF enables input capture on three channels and exposes additional GPIOs. Thus, while mechanical footprint and power/ground pin locations are identical, signal routing and peripheral enablement require board-level verification - it is not a drop-in replacement without firmware and layout review.
What development tools are officially supported for the MC56F8256VLF?
The MC56F8256VLF is supported by NXP's legacy CodeWarrior IDE v10.x and Processor Expert™ rapid application design toolset, both validated for this device. Evaluation is enabled via the DEMO56F8256 demonstration board, which includes onboard JTAG/EOnCE debug interface, motor control header, and CAN transceiver. While Kinetis Design Studio and MCUXpresso do not support the 56800E core, third-party GCC-based toolchains (e.g., naken-asm) with custom linker scripts are documented for bare-metal use - official NXP support remains limited to CodeWarrior and associated EVMs.
MC56F8256VLF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 48-LQFP
- Series:
- 56F8xxx
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- 56800E
- Core Size:
- 16-Bit
- Speed:
- 60MHz
- Connectivity:
- CANbus, I2C, LINbus, SCI, SPI
- Peripherals:
- LVD, POR, PWM, WDT
- Number of I/O:
- 39
- Program Memory Size:
- 64KB (32K x 16)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 4K x 16
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 3.6V
- Data Converters:
- A/D 10x12b; D/A 1x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MC56F8256VLF FAQ
1.How can I place an order for MC56F8256VLF through Aetrix?
Please submit a Request for Quotation (RFQ) for MC56F8256VLF 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 MC56F8256VLF reliable?
The price and inventory of MC56F8256VLF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC56F8256VLF is usually 5 days.
3.What payment methods are accepted for MC56F8256VLF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC56F8256VLF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC56F8256VLF?
MC56F8256VLF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC56F8256VLF 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 MC56F8256VLF?
For technical support, including MC56F8256VLF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC56F8256VLF requirements.
6.How does Aetrix verify that MC56F8256VLF is sourced from the original manufacturer or authorized distributors?
All MC56F8256VLF 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 MC56F8256VLF meets industry standards.
7.What is the process for return or replacement of MC56F8256VLF?
All MC56F8256VLF units undergo pre-shipment inspection (PSI). If there is an issue with MC56F8256VLF, 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 MC56F8256VLF part is unused and in its original packaging.
Return procedure for MC56F8256VLF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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