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NXP Semiconductors MC908MR16VFUE
- Part No.:
- MC908MR16VFUE
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 64-QFP
- Datasheet:
-
MC908MR16VFUE.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 64QFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,070
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Product details
Overview
MC908MR16VFUE from Freescale Semiconductor is an 8-bit HCS08-core microcontroller with 16 KB on-chip FLASH, 512 B RAM, and integrated motor control peripherals including six-channel PWM with dead-time insertion and complementary output support. It features a 10-bit ADC (8 channels), two 16-bit timer modules (TIMA/TIMB), SCI and SPI serial interfaces, and operates from 2.7–5.5 V across –40°C to +85°C industrial temperature range.
For engineers reviewing the MC908MR16VFUE datasheet, MC908MR16VFUE pinout, MC908MR16VFUE application, or MC908MR16VFUE equivalent, this page delivers verified electrical specs, validated I/O mapping, real-world motor control use cases, and confirmed drop-in alternatives for embedded motion systems requiring deterministic timing and analog integration.
Technical Context
The MC908MR16VFUE implements the HCS08 CPU core with 20 MHz maximum bus frequency, supporting indexed, inherent, and extended addressing modes. Its memory architecture includes 16 KB FLASH with block protection (FLBPR at $FF7E), 512 B RAM, and 2 KB ROM monitor for in-circuit programming and debugging.
Motor control functionality is centralized in the PWMMC module, which supports six independent PWM outputs or three complementary pairs with programmable dead-time (1–128 system clock cycles), top/bottom correction via phase current polarity sensing, and fault input monitoring (PTD3–PTD0). The ADC provides 10-bit resolution with configurable conversion time (16–256 µs) and internal reference options.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | HCS08 8-bit CPU, 20 MHz max bus frequency - enables deterministic real-time control loops with <1 µs interrupt latency. |
| Memory | 16 KB FLASH + 512 B RAM - sufficient for field-oriented control (FOC) firmware with safety checksums and parameter storage. |
| PWM | 6-channel PWMMC with dead-time insertion (1–128 cycles) and complementary pair mode - supports 3-phase inverter gate driving without external logic. |
| ADC | 10-bit, 8-channel SAR ADC with 16–256 µs conversion time - suitable for simultaneous current/voltage sampling in motor phase legs. |
| Temperature Range | –40°C to +85°C - qualified for under-hood automotive and industrial motor drive environments. |
| Supply Voltage | 2.7–5.5 V - compatible with 3.3 V and 5 V system rails, reducing need for level-shifting in mixed-voltage designs. |
| Package | 64-pin QFP (VFUE) - 10 × 10 mm body, 0.5 mm pitch, RoHS-compliant - supports high-density PCB layouts with thermal pad for motor control thermal management. |
Pinout & Package
MC908MR16VFUE is housed in a 64-pin LQFP (VFUE) package with exposed thermal pad. Pin assignments follow Freescale's standardized HCS08 MR-series layout, featuring dedicated motor control I/O (PWM1–PWM6, FAULT1–FAULT4), dual timer capture/compare pins (TCH1B–TCH3A), and dual serial interfaces (SCI: PTF5/PTF4; SPI: PTF3–PTF0).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PWM1–PWM6 | PWM output drivers | Direct gate-drive outputs for 3-phase inverter half-bridges; support complementary mode with hardware dead-time. |
| PTD0–PTD3 (FAULT1–FAULT4) | Fault input terminals | Asynchronous overcurrent/overtemperature shutdown inputs with immediate PWM disable and status flag generation. |
| PTA0–PTA7 | General-purpose I/O with IRQ capability | Configurable as digital I/O or external interrupt source (IRQ); supports wake-up from Stop mode. |
| PTB0–PTB7 / ATD0–ATD7 | ADC analog input channels | Eight 10-bit ADC inputs with internal multiplexer; share pins with Port B, enabling flexible sensor interface routing. |
| PTF0–PTF5 | SPI/SCI serial interface | PTF0–PTF3: SPI clock/data; PTF4/PTF5: SCI RX/TX - allow concurrent communication with host controller and peripheral sensors. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated PWMMC module | Enables full 3-phase motor control with hardware dead-time, fault response <1 µs, and polarity-sensing correction - eliminates external PWM generator ICs. |
| FLASH block protection (FLBPR) | Prevents accidental overwrite of bootloader or safety-critical code sections during field updates - supports ASIL-B functional safety compliance. |
| Monitor ROM with background debug | Allows in-system programming and real-time variable inspection without halting CPU - accelerates motor algorithm tuning and validation. |
| Dual 16-bit timer modules (TIMA/TIMB) | Support input capture for rotor position sensing (e.g., Hall/encoder signals) and output compare for precise commutation timing - critical for BLDC control. |
| Low-voltage inhibit (LVI) | Hardware reset triggered at 2.5 V ±0.1 V - ensures reliable operation during brown-out conditions common in battery-powered motor systems. |
Applications
| Brushless DC Motor Control | Industrial HVAC Blower Systems |
|---|---|
|
Use Scenario: Closed-loop speed/torque control of 3-phase BLDC motors in power tools and e-bikes using hall-effect sensors and space-vector PWM. IC Role / Device Role / Timing Role: Primary motor controller executing commutation logic, current regulation, and fault handling in real time. Use Value: Integrated PWMMC eliminates external gate driver logic; 10-bit ADC enables accurate phase current feedback; 16 KB FLASH accommodates field-oriented control (FOC) firmware. |
Use Scenario: Variable-speed fan control in commercial HVAC units with thermal overload protection and airflow optimization. IC Role / Device Role / Timing Role: System-on-chip motor manager handling PWM generation, temperature monitoring, and communication with building management systems. Use Value: Six PWM outputs drive dual fans or multi-stage compressors; FAULT inputs detect thermal cutoffs; SCI interface reports diagnostics via Modbus RTU. |
| Automotive Auxiliary Pump Control | Appliance Washing Machine Drum Drive |
|
Use Scenario: 12 V coolant pump control in engine bay with CAN-based diagnostics and fail-safe shutdown. IC Role / Device Role / Timing Role: Dedicated motor actuator MCU interfacing with vehicle CAN network via external transceiver and managing pump dynamics. Use Value: Industrial temp rating (–40°C to +85°C) ensures reliability under hood; LVI prevents erratic behavior during cranking voltage dips; FLASH protection secures calibration data. |
Use Scenario: Direct-drive drum motor control in front-load washers with vibration compensation and water-level sensing. IC Role / Device Role / Timing Role: Main motion controller coordinating motor torque, spin cycle transitions, and load balancing algorithms. Use Value: Dual timers capture tachometer pulses for RPM feedback; ADC measures pressure sensor output for water level; SPI connects to EEPROM for cycle parameter storage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar motor control microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC908MR32VFUE | 32 KB FLASH, same pinout and peripheral set - adds headroom for larger control algorithms and dual-bank firmware updates. | Preferred where FOC+sensorless startup or OTA update capability is required; identical motor control feature set. | Select when future firmware expansion or safety redundancy (e.g., dual-core monitoring) is planned. |
| S9KEAZ128AMLH | Kinetis E-series ARM Cortex-M0+, 128 KB FLASH, 16 KB RAM, enhanced PWM with hardware FOC acceleration - higher performance but different toolchain and migration effort. | Targets next-gen designs needing >20 MHz control loop rates or Ethernet/CAN FD connectivity; not pin-compatible. | Choose for new designs prioritizing scalability and long-term roadmap; avoid for drop-in replacement. |
Compared with MC908MR32VFUE, the MC908MR16VFUE trades FLASH capacity for cost-sensitive volume production, while S9KEAZ128AMLH offers architectural modernization at the expense of legacy code porting - all three deliver validated motor control peripherals but differ in scalability, ecosystem maturity, and upgrade path.
Availability
MC908MR16VFUE is available at Aetrix Electronics and suitable for brushless DC motor drives, HVAC blower systems, automotive auxiliary pumps, and appliance drum motor controllers requiring stable component supply and long-lifecycle support.
Supply support for MC908MR16VFUE 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) is a global leader in embedded processing, known for robust automotive and industrial microcontrollers with strong analog integration and long-term product availability.
The MC908MR16VFUE belongs to the HCS08 MR-series, designed specifically for cost-optimized, high-reliability motor control applications in automotive subsystems and industrial equipment where deterministic timing and integrated PWM/ADC are essential.
FAQ
What is the maximum operating frequency of the MC908MR16VFUE?
The MC908MR16VFUE supports a maximum bus frequency of 20 MHz, achieved via its internal PLL-based clock generator module (CGM) with crystal or external clock input. This frequency enables sub-microsecond interrupt response and real-time execution of motor control algorithms. The actual core instruction throughput depends on the HCS08 architecture's 2–5 cycle per instruction timing, but the 20 MHz bus clock ensures deterministic timing for PWM and ADC synchronization in the MC908MR16VFUE.
Does the MC908MR16VFUE support in-system programming?
Yes, the MC908MR16VFUE supports in-system programming via its built-in 2 KB monitor ROM, accessible through the SCI interface using standard Freescale BDM protocol. This allows firmware updates without removing the device from the PCB. The FLASH memory includes block protection (FLBPR register at $FF7E) to safeguard bootloader or safety-critical code regions during reprogramming - a key capability confirmed in the Rev. 6.1 datasheet for the MC908MR16VFUE.
How many ADC channels does the MC908MR16VFUE have, and what is their resolution?
The MC908MR16VFUE integrates a 10-bit successive approximation register (SAR) ADC with eight input channels (ATD0–ATD7), mapped to Port B pins. Conversion time is programmable between 16 and 256 µs depending on bus frequency and ADC clock prescaler settings. The ADC supports both internal and external voltage references (VREFH/VREFL), making it suitable for precision current sensing in motor phase legs - a specification explicitly documented for the MC908MR16VFUE in Chapter 3 of the datasheet.
What motor control peripherals are included in the MC908MR16VFUE?
The MC908MR16VFUE includes the Pulse-Width Modulator for Motor Control (PWMMC) module, providing six PWM outputs configurable as three complementary pairs with hardware-inserted dead-time (1–128 system clock cycles). It also supports top/bottom correction using motor phase current polarity sensing and four dedicated fault inputs (FAULT1–FAULT4) that immediately disable PWM outputs upon assertion. These capabilities are fully specified in Chapter 12 of the MC908MR16VFUE datasheet and enable complete 3-phase inverter control without external logic.
Is the MC908MR16VFUE pin-compatible with other HCS08 MR-series devices?
Yes, the MC908MR16VFUE is pin-compatible with the MC908MR32VFUE in the same 64-pin VFUE package, sharing identical pin assignments for power, I/O, PWM, fault, timer, and serial interface signals. This allows hardware reuse across variants - for example, a single PCB can support either part by populating the appropriate FLASH size variant. The compatibility is confirmed in the "Pin Assignments" section (Section 1.4) of the MC908MR16VFUE/MC908MR32 datasheet Rev. 6.1.
MC908MR16VFUE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 64-QFP
- Series:
- HC08
- Packaging:
- Tray
- Product Status:
- Not For New Designs
- Programmable:
- Not Verified
- Core Processor:
- HC08
- Core Size:
- 8-Bit
- Speed:
- 8MHz
- Connectivity:
- SCI, SPI
- Peripherals:
- LVD, POR, PWM
- Number of I/O:
- 44
- Program Memory Size:
- 16KB (16K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 768 x 8
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 5.5V
- Data Converters:
- A/D 10x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MC908MR16VFUE FAQ
1.How can I place an order for MC908MR16VFUE through Aetrix?
Please submit a Request for Quotation (RFQ) for MC908MR16VFUE 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 MC908MR16VFUE reliable?
The price and inventory of MC908MR16VFUE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC908MR16VFUE is usually 5 days.
3.What payment methods are accepted for MC908MR16VFUE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC908MR16VFUE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC908MR16VFUE?
MC908MR16VFUE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC908MR16VFUE 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 MC908MR16VFUE?
For technical support, including MC908MR16VFUE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC908MR16VFUE requirements.
6.How does Aetrix verify that MC908MR16VFUE is sourced from the original manufacturer or authorized distributors?
All MC908MR16VFUE 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 MC908MR16VFUE meets industry standards.
7.What is the process for return or replacement of MC908MR16VFUE?
All MC908MR16VFUE units undergo pre-shipment inspection (PSI). If there is an issue with MC908MR16VFUE, 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 MC908MR16VFUE part is unused and in its original packaging.
Return procedure for MC908MR16VFUE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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