MC908MR32CBE - 8-Bit HC08MR MCU 32KB Flash 5V | NXP
MPN: MC908MR32CBE ✓ فعالMC908MR32CBE جائزہ
A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (Flash/RAM), and peripherals (timers, ADC, PWM, communication ports) onto one IC. The HC08 family is NXP's 8-bit CISC architecture, optimized for low-cost, deterministic embedded control. The HC08MR sub-family specifically adds a 6-channel 12-bit PWM (with programmable dead-time insertion) and a 10-bit ADC, placing it in the "Motor Control Power Management MCU" tier of the 8-bit controller hierarchy: HC08 < HC08MR < 8-bit MCU < microcontroller < embedded processor < semiconductor.
Key features include 32KB Flash organized as 32K x 8, 768B RAM, on-chip In-Circuit Programming (FLASHplus) via a single-wire background debug interface, low-voltage reset (LVR), and a clock generator module supporting crystal or internal bus operation. The wide 5V supply tolerance makes it well suited to industrial motor drives and appliance controls powered directly from rectified mains-derived rails. Per the HC08MR series datasheet, the part retains the classic HC08 instruction set for code compatibility with the broader M68HC05/M68HC08 family migration path.
Architecturally, the MC908MR32CBE uses the HC08 CPU core with a 16-bit index register and stack pointer, a sophisticated 12-bit PWM generator with edge- and center-aligned modes, and a 12-channel 10-bit successive-approximation ADC. The integrated fault-input and dead-time logic simplify three-phase inverter firmware, and dual high-current output pins (up to 10 mA) ease interface to gate-driver optocouplers. Mask-set revisions are documented in the MC68HC908MR32 Rev. 6.1 datasheet shipped on the NXP documents server.
Typical applications include washing-machine and dishwasher motor drives, ceiling-fan and small industrial inverters, switch-mode power-supply primary-side controllers, and white-goods appliance control boards. It also appears in low-cost fan pumps and hobby BLDC motor controllers where 8-bit determinism and integrated PWM outweigh the need for an ARM Cortex core. The part's wide 5V rail and 56-pin PSDIP footprint remain attractive for through-hole serviceable designs.
Designers should plan for a bypass capacitor network (typically a 100 nF ceramic plus an optional bulk electrolytic) within a few millimeters of the VDD pins, route the PWM outputs symmetrically to preserve dead-time accuracy, and ensure that programming/debug pins (IRQ, BKGD) are accessible for in-circuit firmware updates. Withdrawing mains-side 5V derived supplies must hold above 4.5V to avoid a brown-out reset during motor ramp.
This page synthesizes verified distributor data, drop-in compatible NXP/Freescale pin-to-pin alternatives, and design notes that go beyond the raw datasheet presentation, helping engineers select the right HC08MR device for production.
کے لیے ڈراپ اِن متبادل MC908MR32CBE — یکساں پیکیج، پن سے پن مطابقت پذیر۔ مختلف پیکیج والے پرزے جن کے لیے PCB دوبارہ کام درکار ہو، شامل نہیں ہیں۔
اس سیریز میں مختلف ورژن
اسی سیریز کے ماڈلز جو ڈراپ اِن مطابقت رکھتے ہیں MC908MR32CBE (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Program Memory Size, Supply Voltage, Core, Package / Case, RAM Size.
MC908MR16CBE
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ڈیٹا شیٹ دیکھیں →MC908MR32CBE زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| Core | HC08 (8-bit CISC) |
| Processor Series | HC08MR |
| ڈیٹا بس چوڑائی | 8 bit |
| زیادہ سے زیادہ کلاک فریکوئنسی | 8 MHz |
| Program Memory Size | 32 KB (32K x 8) Flash |
| RAM Size | 768 B |
| PWM Channels | 6 x 12-bit (with dead-time insertion) |
| ADC | 10-bit, 12 channels |
| Supply Voltage (Min) | 4.5 V |
| Supply Voltage (Max) | 5.5 V |
| آپریٹنگ درجہ حرارت رینج | -40C to +85C |
| پیکیج / کیس | 56-PSDIP (0.600", 15.24 mm) |
| ماؤنٹنگ اسٹائل | Through Hole |
| Number of ADC Channels | 12 |
MC908MR32CBE پن کنفیگریشن
| پن 1 | PTF0/TCH0 — Port F bit 0 / Timer Channel 0 |
| پن 2 | PTF1/TCH1 — Port F bit 1 / Timer Channel 1 |
| پن 3 | PTF2/TCH2 — Port F bit 2 / Timer Channel 2 |
| پن 4 | PTF3/TCH3 — Port F bit 3 / Timer Channel 3 |
| پن 5 | PTF4/TCH4 — Port F bit 4 / Timer Channel 4 |
| پن 6 | PTF5/TCH5 — Port F bit 5 / Timer Channel 5 |
| پن 7 | VDD — Positive power supply (5V) |
| پن 8 | VSS — Ground |
| پن 9 | OSC1 — Crystal oscillator input |
| پن 10 | OSC2 — Crystal oscillator output |
| پن 11 | RST — Reset input (active low) |
| پن 12 | IRQ — External interrupt request |
| پن 13 | BKGD — Background debug / mode select |
| پن 14 | PWM6 — PWM channel 6 output |
| پن 15 | PWM5 — PWM channel 5 output |
| پن 16 | PWM4 — PWM channel 4 output |
| پن 17 | PWM3 — PWM channel 3 output |
| پن 18 | PWM2 — PWM channel 2 output |
| پن 19 | PWM1 — PWM channel 1 output |
| پن 20 | VSS — Ground |
| پن 21 | PTE0/TxD — Port E bit 0 / SCI transmit |
| پن 22 | PTE1/RxD — Port E bit 1 / SCI receive |
| پن 23 | PTE2 — Port E bit 2 |
| پن 24 | PTE3 — Port E bit 3 |
| پن 25 | PTE4 — Port E bit 4 |
| پن 26 | PTE5 — Port E bit 5 |
| پن 27 | PTA0 — Port A bit 0 |
| پن 28 | PTA1 — Port A bit 1 |
| پن 29 | PTA2 — Port A bit 2 |
| پن 30 | PTA3 — Port A bit 3 |
| پن 31 | PTA4 — Port A bit 4 |
| پن 32 | PTA5 — Port A bit 5 |
| پن 33 | PTA6 — Port A bit 6 |
| پن 34 | PTA7 — Port A bit 7 |
| پن 35 | PTB0/ATD0 — Port B bit 0 / ADC channel 0 |
| پن 36 | PTB1/ATD1 — Port B bit 1 / ADC channel 1 |
| پن 37 | PTB2/ATD2 — Port B bit 2 / ADC channel 2 |
| پن 38 | PTB3/ATD3 — Port B bit 3 / ADC channel 3 |
| پن 39 | PTB4/ATD4 — Port B bit 4 / ADC channel 4 |
| پن 40 | PTB5/ATD5 — Port B bit 5 / ADC channel 5 |
| پن 41 | PTB6/ATD6 — Port B bit 6 / ADC channel 6 |
| پن 42 | PTB7/ATD7 — Port B bit 7 / ADC channel 7 |
| پن 43 | PTC0/ATD8 — Port C bit 0 / ADC channel 8 |
| پن 44 | PTC1/ATD9 — Port C bit 1 / ADC channel 9 |
| پن 45 | PTC2/ATD10 — Port C bit 2 / ADC channel 10 |
| پن 46 | PTC3/ATD11 — Port C bit 3 / ADC channel 11 |
| پن 47 | PTC4 — Port C bit 4 |
| پن 48 | PTC5 — Port C bit 5 |
| پن 49 | PTC6 — Port C bit 6 |
| پن 50 | PTC7 — Port C bit 7 |
| پن 51 | PTD0/FAULT — Port D bit 0 / PWM fault input |
| پن 52 | PTD1 — Port D bit 1 |
| پن 53 | PTD2 — Port D bit 2 |
| پن 54 | PTD3 — Port D bit 3 |
| پن 55 | PTD4 — Port D bit 4 |
| پن 56 | PTD5 — Port D bit 5 |
عام استعمالات
MC908MR32CBE کے لیے موزوں ہے 6 ایپلیکیشنs: Washing Machine Motor Drive, Three-Phase Ceiling Fan Inverter, Switched-Mode Power Supply Primary Controller, Appliance Control Board (White Goods), BLDC Hobby Motor / Drone Controller, Industrial 5V Fan Pump Controller.
Washing Machine Motor Drive
The MC908MR32CBE's 6-channel 12-bit PWM with dead-time insertion and 10-bit ADC make it a strong fit for washing-machine drum and pump motors where 8-bit determinism and on-chip fault inputs reduce BOM cost. The 8 MHz HC08 core delivers predictable loop timing for direct mains-fed inverter control, while 32KB Flash holds speed-ramp tables and diagnostic code. Designers leverage the integrated current-sense ADC for closed-loop torque control without external DSP hardware. The 56-PSDIP through-hole package also streamlines quick-turn industrial design and field repair.
تجویز کردہ
Three-Phase Ceiling Fan Inverter
For ceiling-fan and HVAC-fan inverters, the MC908MR32CBE drives six PWM outputs in complementary mode with programmable dead time, eliminating external gate-driver logic. Its 4.5V-5.5V operating range tolerates rectified mains-rail supply variation, while the 10-bit ADC senses motor current and BEMF for sensorless commutation firmware. The HC08 instruction set keeps interrupt latency predictable at the 8 MHz bus clock, critical when commutating at 24 kHz PWM. 32KB Flash fits full sine-table, ramp, and fault-handler routines on a single chip.
تجویز کردہ
Switched-Mode Power Supply Primary Controller
In primary-side SMPS controllers the MC908MR32CBE substitutes a low-cost digital controller for legacy UC3842-style analog ICs. Its high-resolution PWM and 10-bit ADC let the HC08 implement peak-current-mode control with adjustable slope compensation, while 32KB Flash stores the entire digital-compensation firmware plus telemetry. The 5V supply rails ride directly off auxiliary winding bias with no extra LDO required. Programmable dead time protects synchronous-rectifier FETs during soft-start.
تجویز کردہ
Appliance Control Board (White Goods)
White-goods main boards rely on the MC908MR32CBE for cost-effective deterministic control of relays, valves, and BLDC pumps. The 8-bit HC08 core runs long-term appliance firmware comfortably within 32KB Flash budget, while the 10-bit ADC reads temperature sensors (NTCs) and pressure transducers for closed-loop appliance cycles. The wide 4.5V-5.5V supply range tolerates mains-derived 5V ripple, and FLASHplus allows factory-line firmware upgrades without a programming socket. The 56-PSDIP package simplifies hand-rework in service centers.
تجویز کردہ
BLDC Hobby Motor / Drone Controller
Hobby-grade BLDC controllers and small drone ESCs use the MC908MR32CBE because it integrates 6-channel 12-bit PWM with dead-time and 10-bit current-sense ADC on a 5V rail. The HC08 core handles trapezoidal or simple sine commutation at 8 MHz with predictable interrupt latency, while the Flash-plus in-circuit programming interface lets hobbyists reflash without a socketed chip. 56-PSDIP through-hole package is friendly to breadboard prototyping in DIY open-source ESC designs.
تجویز کردہ
Industrial 5V Fan Pump Controller
Industrial HVAC and small water-pump controllers pair the MC908MR32CBE with a 5V power supply on a PSDIP-friendly PCB. The MCU's 768B RAM is more than enough for sensor-data ping-pong buffers and PID state, while 12 PWM channels drive multiple pumps or fans simultaneously. The wide -40C to +85C operating temperature handles industrial-cabinet installations, and the 10-bit ADC provides local temperature and pressure feedback. Drop-in upgrade path to MC908MR32CFU (QFP) exists for SMD migrations.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا MC908MR32CBE — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | MC908MR16CBE | MC908MR32VFU | MC908MR32CFU |
|---|---|---|---|---|
| Package | 56-PSDIP | 56-PSDIP - same | 56-QFP - different package | 56-QFP - different package |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core | HC08 (8-bit) | HC08 (8-bit) | HC08 (8-bit) | HC08 (8-bit) |
| Flash Memory | 32 KB | 16 KB (-50%) | 32 KB (same) | 32 KB (same) |
| RAM Size | 768 B | 768 B (same) | 768 B (same) | 768 B (same) |
| Maximum Clock Frequency | 8 MHz | 8 MHz (same) | 8 MHz (same) | 8 MHz (same) |
| Supply Voltage Range | 4.5V to 5.5V | 4.5V to 5.5V | 4.5V to 5.5V | 4.5V to 5.5V |
| PWM Channels | 6 x 12-bit | 6 x 12-bit (same) | 6 x 12-bit (same) | 6 x 12-bit (same) |
| ADC Resolution / Channels | 10-bit / 12 channels | 10-bit / 12 channels | 10-bit / 12 channels | 10-bit / 12 channels |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Mounting Style | Through Hole | Through Hole | Surface Mount | Surface Mount |
اہم امتیازی خصوصیات
- 56-PSDIP through-hole package serviceable for industrial repair (بمقابلہMC908MR32VFU (56-QFP))
- Upward-compatible 32KB Flash (بمقابلہMC908MR16CBE (16KB))
- Motor-control-optimized PWM with dead-time insertion (بمقابلہMC908AP32CFBE (general-purpose AP))
ڈیزائن نوٹس
Place a 100 nF ceramic decoupling capacitor as close as possible to each VDD/VSS pin pair (per the NXP HC08MR datasheet Figure on bypass). Add a single 10 uF to 100 uF bulk electrolytic near the MCU to sink PWM-driver switching transients. The 5V rail must hold above 4.5V across full load to avoid low-voltage-reset, particularly during motor inrush events.
Route the six PWM outputs in matched-length pairs so complementary-channel dead-time accuracy is preserved. Keep the PWM traces away from ADC analog inputs to minimize digital-to-analog crosstalk. The BKGD/IRQ pins should be pulled to header pads so in-circuit programming remains accessible after board assembly. Crystal traces to OSC1/OSC2 should be short and surrounded by a grounded guard ring.
Estimated: At 32KB Flash and 8 MHz bus, an external 4 MHz crystal with on-chip PLL is the typical clocking configuration; do not exceed the 8 MHz maximum bus frequency. Watch for the difference between Flash erase-block sizes when designing in-application firmware updaters - the HC08MR Flash is divided into fixed sectors. Avoid applying power to the MCU before the 5V rail fully stabilizes, as partial-voltage programming can corrupt Flash rows.
تعمیل کی معلومات
Specific RoHS/REACH statements are not present in the verified distributor data for MC908MR32CBE. NXP/Freescale HC08 legacy MCU pages frequently omit the RoHS badge for older part revisions; designers should verify with the manufacturer declaration or by requesting a CoC before design-in.
