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NXP Semiconductors MC56F8257VLH
- Part No.:
- MC56F8257VLH
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
MC56F8257VLH.pdf
- Description:
- IC MCU 16BIT 64KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,054
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Product details
Overview
MC56F8257VLH from NXP (formerly Freescale) is a 16-bit digital signal controller (DSC) built on the 56800E core, operating at 60 MHz with 64 KB program flash, 6 KB data RAM, and integrated eFlexPWM, dual 8-channel 12-bit ADCs, and a 12-bit DAC - designed for real-time motor control and switched-mode power supply regulation in industrial and appliance systems.
For engineers reviewing the MC56F8257VLH datasheet, MC56F8257VLH pinout, MC56F8257VLH application, or MC56F8257VLH equivalent, key selection considerations include its 64-pin LQFP package, dual ADC support with programmable gain amplifiers (x1/x2/x4), eFlexPWM timing resolution, CAN 2.0B interface, and hardware CRC for firmware integrity in safety-critical power conversion designs.
Technical Context
The MC56F8257VLH implements a hybrid DSP/MCU architecture with dual Harvard buses enabling up to six operations per instruction cycle. It integrates an inter-module crossbar switch (XBAR) that enables dynamic routing between eFlexPWM, ADCs, QuadTimers, DACs, analog comparators, and I/O pins without fixed hardware paths.
Its system-level timing includes a crystal oscillator, PLL for clock multiplication, and relaxation oscillator for fail-safe operation. The device supports JTAG/On-Chip Emulation (OCE) and includes dedicated peripherals for motor control - including three analog comparators with hysteresis, high-resolution PWM with dead-time insertion, and phase-shifted PWM outputs for multi-phase inverters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | 56800E 16-bit DSC core @ 60 MHz - delivers deterministic real-time control with DSP-accelerated math instructions for field-oriented control (FOC) loops. |
| Memory | 64 KB on-chip Flash (program), 6 KB SRAM (data) - sufficient for dual-loop FOC + communication stack in BLDC/PMSM drives without external memory. |
| ADC | Dual 8-channel 12-bit ADCs (ADCA & ADCB) with PGA (x1/x2/x4) - enables simultaneous current sensing across multiple phases with <1 µs conversion time. |
| PWM | 8-channel eFlexPWM with independent dead-time, phase shift, and fault protection - supports 3-phase inverter control with synchronous sampling trigger to ADCs. |
| Communication | 1× CAN 2.0B controller, 2× I²C/SMBus, 2× QSCI, 1× QSPI - provides robust fieldbus connectivity for motor drive supervision and diagnostics. |
| Analog | 1× 12-bit DAC, 3× analog comparators, voltage regulator, POR, LVI - enables closed-loop reference generation and overvoltage/overcurrent trip detection without external components. |
| Clock | Crystal oscillator + PLL + relaxation oscillator - ensures reliable startup and clock redundancy for fail-safe operation in industrial environments. |
Pinout & Package
MC56F8257VLH is housed in a 64-lead LQFP package (10 mm × 10 mm, 0.5 mm pitch) with exposed thermal pad, rated for -40°C to +105°C operation. Pin assignments are defined in NXP document MC56F8257RM Rev. 5.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA/VSSA | Analog power/ground | Separate analog domain supply pins - required for clean ADC/DAC reference and comparator operation; must be decoupled independently. |
| ADCA0–ADCA7 | Analog input channels | Eight dedicated inputs for ADCA - support simultaneous sampling with PGA gain selection for motor phase current measurement. |
| PWM_A0–PWM_A7 | eFlexPWM output signals | Eight high-resolution PWM outputs - configurable as complementary pairs with programmable dead-time for inverter gate driving. |
| CAN_TX/CAN_RX | CAN bus interface | Differential transceiver pins - connect directly to ISO 11898-compliant CAN physical layer for motor drive network communication. |
| XTAL_IN/XTAL_OUT | Crytal oscillator terminals | Drive external 4–8 MHz crystal - provides stable base clock for PLL multiplication to 60 MHz system frequency. |
Key Features
| Feature | Design Value |
|---|---|
| Inter-module crossbar (XBAR) | Programmable internal signal routing between ADC triggers, PWM faults, timer captures, and I/O pins - eliminates fixed peripheral coupling and enables custom control topologies. |
| eFlexPWM with fault protection | Hardware-based shutdown on external FAULT pin assertion or internal comparator trip - disables PWM outputs within <100 ns to protect power stage MOSFETs/IGBTs. |
| Dual 12-bit ADCs with PGA | Simultaneous sampling of up to 16 analog signals with selectable gain - enables direct shunt-based current sensing across 3-phase motors without external op-amps. |
| Embedded 12-bit DAC | Generates precise analog references or waveforms (square/triangle/sawtooth) - replaces external DACs in sensor biasing, soft-start ramping, or analog feedback injection. |
| Hardware CRC module | Performs real-time checksum calculation on Flash memory blocks - supports secure boot validation and firmware update integrity checking per IEC 61508 SIL-2 requirements. |
Applications
| Industrial Motor Drives | Solar Inverters |
|---|---|
Use Scenario: Closed-loop vector control of PMSM/BLDC motors in HVAC compressors and industrial pumps. IC Role / Device Role / Timing Role: Real-time execution of FOC algorithm, synchronized ADC sampling, and high-resolution PWM generation with <100 ns timing precision. Use Value: Enables >95% efficiency and <5% torque ripple through deterministic 20 kHz PWM switching and sub-microsecond current loop response. | Use Scenario: DC-to-AC conversion in single-phase string inverters with MPPT and anti-islanding protection. IC Role / Device Role / Timing Role: Dual ADC acquisition of DC link voltage/current and AC grid voltage/current, coupled with eFlexPWM for sinusoidal modulation and CAN for grid compliance reporting. Use Value: Supports IEEE 1547-compliant reactive power control and rapid fault shutdown (<20 ms) using hardware comparator-triggered PWM disable. |
| Switched-Mode Power Supplies | Battery Management Systems |
Use Scenario: Digital control of resonant LLC and phase-shifted full-bridge topologies in server PSUs and telecom rectifiers. IC Role / Device Role / Timing Role: High-speed ADC sampling of primary-side current/voltage, real-time PID compensation, and adaptive dead-time PWM control. Use Value: Achieves <1% load regulation and <0.5% line regulation across 10–100% load range via 12-bit ADC resolution and 150 ps PWM edge placement. | Use Scenario: Cell balancing, voltage/temperature monitoring, and charge/discharge control in 12S Li-ion battery packs for power tools and e-bikes. IC Role / Device Role / Timing Role: Simultaneous 12-bit ADC measurement of 12 cell voltages via multiplexed inputs, coupled with DAC-generated reference for comparator-based overvoltage detection. Use Value: Enables ±1 mV cell voltage accuracy and autonomous hardware-triggered cell disconnect within 500 ns, meeting UL 1973 safety thresholds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital signal controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC56F8323VLH | Same 64-pin LQFP package; higher Flash (128 KB) and RAM (12 KB); adds USB OTG and enhanced CAN FD support. | Better suited for complex BMS with OTA updates or multi-protocol gateways requiring USB host capability. | Select MC56F8323VLH when firmware size exceeds 64 KB or USB connectivity is required; MC56F8257VLH remains optimal for cost-sensitive, fixed-function motor control. |
| TMS320F28027FPTT | 32-bit C28x core @ 60 MHz; 64 KB Flash, 12 KB RAM; single 12-bit ADC (16 ch); no integrated DAC or PGA. | Lacks analog front-end integration - requires external op-amps and DACs for current sensing and reference generation. | Choose TMS320F28027FPTT only if TI ecosystem compatibility or C28x toolchain familiarity outweighs added BOM cost and layout complexity. |
Compared with MC56F8323VLH and TMS320F28027FPTT, the MC56F8257VLH offers superior analog integration (dual ADCs + PGA + DAC) in a lower-cost 16-bit platform, making it ideal for high-volume, performance-constrained motor and power conversion where external component count reduction is critical.
Availability
MC56F8257VLH is available at Aetrix Electronics and suitable for industrial motor drives, solar inverters, and switched-mode power supplies requiring stable component supply, long-term lifecycle support, and automotive-grade temperature resilience (-40°C to +105°C).
Supply support for MC56F8257VLH 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 company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, IoT, and mobile applications.
The MC56F82xx series belongs to NXP's legacy DSC portfolio targeting cost-sensitive, high-reliability power electronics - engineered specifically for deterministic real-time control in motor drives, SMPS, and renewable energy converters where analog integration and PWM precision are critical.
FAQ
What is the maximum ADC sampling rate supported by the MC56F8257VLH?
The MC56F8257VLH supports up to 1.25 MSPS aggregate sampling rate across both ADCA and ADCB modules. Each 8-channel 12-bit ADC can operate at 625 kSPS in interleaved mode, with hardware-triggered conversions synchronized to eFlexPWM events - enabling precise current sampling at the center of each PWM period for motor control applications.
Does the MC56F8257VLH support CAN FD or only classical CAN 2.0B?
The MC56F8257VLH integrates a single Controller Area Network (CAN) module compliant with ISO 11898-1:2003, supporting only classical CAN 2.0B (up to 1 Mbps). It does not support CAN FD features such as flexible data-rate or extended data length. For CAN FD capability, consider the newer MC56F83xx family or NXP S32K series devices.
How is the programmable gain amplifier (PGA) configured on the MC56F8257VLH?
The MC56F8257VLH includes two independent PGAs - one per ADC module (ADCA and ADCB) - each offering selectable gains of x1, x2, or x4 via dedicated control registers. Gain selection is software-configurable per channel and applies before ADC conversion, enabling direct measurement of low-amplitude shunt voltage signals without external amplification circuitry.
What development tools are officially supported for the MC56F8257VLH?
Officially supported tools for the MC56F8257VLH include the TWR-56F8257 Tower System evaluation board, CodeWarrior Development Studio for DSC v8.3 IDE, and FreeMASTER real-time debugging software. These tools provide full JTAG debug access, peripheral configuration wizards, and graphical variable monitoring - all validated against the MC56F8257VLH silicon revision and reference design.
Is EEPROM emulation available on the MC56F8257VLH, and how much storage does it provide?
Yes, the MC56F8257VLH supports EEPROM emulation using its on-chip Flash memory. NXP's provided software library enables up to 64 KB of emulated EEPROM space with wear-leveling and error correction - allowing non-volatile storage of calibration data, runtime parameters, or fault logs without external serial EEPROM components.
MC56F8257VLH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 64-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:
- 54
- 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 16x12b; D/A 1x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MC56F8257VLH FAQ
1.How can I place an order for MC56F8257VLH through Aetrix?
Please submit a Request for Quotation (RFQ) for MC56F8257VLH 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 MC56F8257VLH reliable?
The price and inventory of MC56F8257VLH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC56F8257VLH is usually 5 days.
3.What payment methods are accepted for MC56F8257VLH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC56F8257VLH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC56F8257VLH?
MC56F8257VLH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC56F8257VLH 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 MC56F8257VLH?
For technical support, including MC56F8257VLH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC56F8257VLH requirements.
6.How does Aetrix verify that MC56F8257VLH is sourced from the original manufacturer or authorized distributors?
All MC56F8257VLH 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 MC56F8257VLH meets industry standards.
7.What is the process for return or replacement of MC56F8257VLH?
All MC56F8257VLH units undergo pre-shipment inspection (PSI). If there is an issue with MC56F8257VLH, 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 MC56F8257VLH part is unused and in its original packaging.
Return procedure for MC56F8257VLH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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