MC68HC908MR32CFU - 8MHz 8-bit MCU 32KB Flash 64-QFP | NXP
MPN: MC68HC908MR32CFU ✗ Tapus ng BuhayMC68HC908MR32CFU Ulas
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory, peripherals, and I/O into one package, designed for embedded control tasks. The MC68HC908MR32CFU sits within the broader M68HC08 family taxonomy: MCU -> 8-bit microcontroller -> HC08 family -> motor-control sub-family -> MR32 series. The architecture uses a customer-specified integrated circuit (CSIC) design strategy, allowing NXP/Freescale to mix memory sizes, peripherals, and I/O counts on a common core.
Key features include built-in PWM channels optimised for three-phase motor control, an analog-to-digital converter for current/voltage sensing, and a programmable timer interface (TIM). The FLASH memory supports in-circuit programming and security-lock features for code protection. The 64-QFP package provides ample I/O for power-stage interfacing while maintaining a manageable PCB footprint.
Typical applications include low-end brushless DC (BLDC) and permanent-magnet synchronous motor (PMSM) control, appliance motor drives such as washing machines and refrigerators, HVAC fan control, and industrial variable-frequency drives (VFDs). The PWM and ADC peripherals are hardware-tuned for current-loop control loops. When designing with this MCU, ensure that the 8 MHz internal clock is matched to your application's control-loop bandwidth, and budget for the FLASH/erase endurance if in-system firmware updates are planned.
Mga alternatibo na pwedeng ilagay na MC68HC908MR32CFU — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
Variante sa Seri na ito
Katulad na modelo sa serye na katugma sa pagpasok MC68HC908MR32CFU (parehas na form factor at footprint) — pagkakaiba sa RAM Size, Program Memory Size, Peripherals, ADC, EEPROM Size.
MC908MR32CFUE
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →MC68HC908MR32CFUE
✅ Drop-In📋 Alternatibo na Reference (hindi sa katalogo)
MC68HC908MR16CFU
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →MC68HC908MR32VFU
✅ Drop-In ⚠️ Mga Talaan Hindi Naiwerikmo📋 Alternatibo na Reference (hindi sa katalogo)
MC68HC908MR32CFU Mga Pinakamataas na Rating at Electrical Characteristics
| Core | HC08 (CPU08) |
| Core Size | 8-bit |
| Max Internal Bus Frequency | 8.2 MHz |
| Program Memory Size | 32 KB (32K x 8) |
| Program Memory Type | FLASH |
| RAM Size | 768 bytes |
| Number of I/O Pins | 44 |
| Connectivity | SCI, SPI |
| Peripherals | LVD, POR, PWM |
| ADC | 10-bit, up to 10 channels |
| Packhaging | 64-QFP (14x14 mm) |
| Uri ng Pagpapasok | Surface Mount |
| RoHS | compliant (per DigiKey listing) |
Gabay sa Pin Configuration ng MC68HC908MR32CFU 64-qfp (14x14 mm)
Pin configuration para sa MC68HC908MR32CFU (64-qfp (14x14 mm) package). Kasama sa digital IC na ito ang GPIO, mga communication interface (UART, SPI, I2C), at mga power pin. Sumangguni sa datasheet ng manufacturer para sa mga alternatibong function ng pin at mga opsyon sa configuration. Mahalaga para sa disenyo ng embedded system at PCB layout.
Wala ng detalyadong pinout data na magagamit para sa MC68HC908MR32CFU.
Sumangguni sa datasheet para sa buong pin configuration.
Tipikal na mga Gamit
MC68HC908MR32CFU ay nararapat para sa 6 aplikasyons: Brushless DC (BLDC) Motor Control, Permanent Magnet Synchronous Motor (PMSM) Drives, Home Appliance Motor Drives, Industrial Variable-Frequency Drives (VFDs) - Low Power, Remote Keyless Entry (RKE) and Low-Power Wireless Nodes, Educational and Legacy Motor-Control Development Boards.
Brushless DC (BLDC) Motor Control
The MC68HC908MR32CFU is purpose-built for three-phase BLDC motor control. Its on-chip PWM module and 10-bit ADC up to 10 channels are sized for trapezoidal commutation plus current sensing, while 8.2 MHz internal bus and 32 KB FLASH fit typical sensorless BLDC firmware without external memory. The SCI/SPI block talks to host controllers or isolated gate drivers, and 44 GPIO pins drive three half-bridges plus encoder/commutation inputs. Against an ARM Cortex-M0, the HC08 offers simpler toolchain startup but lower MIPS.
Inirekomenda
Permanent Magnet Synchronous Motor (PMSM) Drives
For low-end PMSM scalar or vector control, the MC68HC908MR32CFU integrates PWM, ADC, and a programmable TIM block capable of centre-aligned PWM generation. The 32 KB FLASH accommodates Park/Clarke transforms and PI current loops for sensorless FOC, while the 768-byte RAM handles per-cycle variables. The 64-QFP package is large enough to expose all motor-control pins without multiplexing, simplifying PCB layout in appliance-class VFD designs.
Inirekomenda
Home Appliance Motor Drives
Washing machines, refrigerators, dishwashers, and HVAC fans are classic applications for the HC908MR32 family. The MCU's wide operating temperature (per NXP rating) and on-chip LVD/POR protection cope with mains-rail noise and brownouts common in white goods. The 8 MHz bus is fast enough for 50/60 Hz mains-synchronous commutation, and 44 I/O pins handle triac/relay drivers plus user-interface keypads without external I/O expanders in cost-sensitive appliance designs.
Inirekomenda
Industrial Variable-Frequency Drives (VFDs) - Low Power
Sub-1 kW industrial VFDs and pump/fan controllers leverage the HC908MR32's motor-control optimised peripherals. The 10-bit ADC samples shunt-resistor current at PWM edges, while the on-chip PWM drives a 3-phase inverter via gate drivers. SCI provides an RS-485 interface to a PLC or HMI; SPI talks to isolated gate drivers or digital potentiometers. The 64-QFP footprint allows through-hole-or-SMT PCB integration with adequate creepage for 230 V mains designs.
Inirekomenda
Remote Keyless Entry (RKE) and Low-Power Wireless Nodes
Although the HC908MR32CFU is primarily positioned for motor control, its low-power HC08 core and small FLASH footprint also fit RKE transmitter designs. The 32 KB FLASH stores encoder/rolling-code logic, SCI/SPI talks to UHF transmitters and EEPROM key storage. For new designs, however, dedicated low-power parts such as the NXP KW series or Microchip PIC16F are more efficient; the MR32CFU is only recommended where motor-driver and RF baseband are colocated on the same PCB.
Inirekomenda
Educational and Legacy Motor-Control Development Boards
The NXP MC68HC908MR32 Control Board (kit ECCTR908MR32UM) ships with the MR32CFU and is widely used in motor-control teaching. Students and engineers learn PWM generation, commutation timing, and ADC-triggered sampling on this platform. The 64-QFP package and exposed SCI/SPI headers make oscilloscope probing and code debugging straightforward. For production graduates, the knowledge transfers directly to the modern NXP S08 and DSC families.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for MC68HC908MR32CFU — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | MC908MR32CFUE | MC68HC908MR32CFUE | MC68HC908MR16CFU | MC68HC908MR32VFU |
|---|---|---|---|---|---|
| Package | 64-QFP (14x14 mm) | 64-QFP (14x14 mm) - same | 64-QFP (14x14 mm) - same | 64-QFP (14x14 mm) - same | 64-QFP (14x14 mm) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core / Speed | HC08, 8.2 MHz | HC08, 8.2 MHz | HC08, 8.2 MHz | HC08, 8.2 MHz | HC08, 8.2 MHz |
| FLASH Size | 32 KB | 32 KB | 32 KB | 16 KB (-50%) | 32 KB |
| RAM Size | 768 bytes | 768 bytes | 768 bytes | 768 bytes | 768 bytes |
| Number of I/O | 44 | 44 | 44 | 44 | 44 |
| Connectivity | SCI, SPI | SCI, SPI | SCI, SPI | SCI, SPI | SCI, SPI |
| Peripherals | LVD, POR, PWM, 10-bit ADC | LVD, POR, PWM, 10-bit ADC | LVD, POR, PWM, 10-bit ADC | LVD, POR, PWM, 10-bit ADC | LVD, POR, PWM, 10-bit ADC |
| Param Match | 100% (this part) | 100% drop-in | 100% drop-in | 80% (FLASH differs) | 95% drop-in |
Pangunahing mga Pagkakaiba
- Larger FLASH for full sensorless FOC firmware (kumpara saMC68HC908MR16CFU)
- Pin-compatible with multiple mask-set revisions (kumpara saMC908MR32CFUE)
- Motor-control optimised peripherals (kumpara saGeneric HC908JL3 (28-DIP))
Talaan ng Disenyo
Estimated: at 5 V VDD and 8.2 MHz CPU, the HC08 core draws approximately 15-25 mA active plus peripheral contributions. Provide a 100 nF ceramic decoupling capacitor as close as possible to every VDD/VSS pair on the 64-QFP, plus a bulk 4.7 uF tantalum or aluminium on the main rail. Use NXP's recommended bypass topology from the MC68HC908MR32 datasheet (Figure 1-4) - high-frequency ceramic plus optional bulk capacitor - to suppress switching-noise-induced ADC errors.
Estimated: the 64-QFP package has a theta_JA of roughly 60-70 C/W on a 2-layer FR4 PCB. For PWM-driven motor control where the CPU is active most of the time, expect junction temperature rise of 20-30 C above ambient at full activity - well within the commercial operating range but watch that industrial-grade variants (MR32CFUE) stay within rated limits when fitted in enclosed appliance housings with limited airflow.
Route the oscillator (OSC1/OSC2) traces as short as possible and guard them with a ground ring to minimise noise coupling into the PLL/internal-bus. Keep ADC input traces away from PWM switching traces; route shunt-resistor sense lines as a kelvin pair directly to the MCU's PGA/ADC inputs to preserve current-loop accuracy. Place a 100 nF cap on each VDD/VSS pair as close as physically possible per NXP AN2203 PCB-layout guidance for HC08 motor-control parts.
Do not confuse the FLASH security-lock byte with the option-byte config: locked FLASH cannot be read out, so back up firmware before locking. Verify that your compiler/linker emit the correct S-record or Intel-HEX format compatible with the P&E BDM tool before deploying firmware. The '68' prefix versus '908' suffix denotes the original Motorola mask revision; firmware generally works on both, but check the silicon errata for any module you actually exercise.
Impormasyon ng Pagsunod sa Kautusan
RoHS compliance per DigiKey product listing (rank 90). Reach, halogen-free, and conflict-mineral statements not present in scraped data - set to 'unknown' rather than fabricate.