MC68332ACFC20 - 32-Bit CPU32 MCU, 20MHz, 132-PQFP | NXP
MPN: MC68332ACFC20 ✗ انتهى عمره الإنتاجيMC68332ACFC20 نظرة عامة
What is a CPU32 microcontroller? The CPU32 is Motorola's 32-bit successor to the 68020, the central processing core of the M68300 modular microcontroller family. A modular MCU combines a high-performance CPU with powerful peripheral subsystems interconnected through a common inter-module bus (IMB). In the broader taxonomy, the MC68332 belongs to microcontrollers -> 32-bit MCUs -> CISC/M68k architecture -> automotive/industrial embedded controllers.
Key features of the MC68332ACFC20 include ROMless operation (external memory required), a System Integration Module (SIM) with chip-select logic, a Time Processor Unit (TPU) for high-resolution timing tasks, and a Queued Serial Module (QSM) for SPI/SCI communication. The device combines high-performance 32-bit data manipulation with peripheral integration that historically eliminated many external glue-logic components in automotive and industrial control designs.
The MC68332 uses a unified bus architecture (IMB) that lets the CPU32 core communicate with on-chip peripheral modules at memory-mapped addresses. The TPU is a dedicated RISC-like timing co-processor that offloads PWM, capture, and stepper-motor pulse generation from the CPU. The QSM provides queued SPI and SCI channels, reducing CPU interrupt overhead in serial-intensive designs.
Typical applications include automotive engine control units (ECUs), industrial motion controllers, robotic control boards, and legacy industrial automation systems. The wide operating voltage and integrated peripherals historically made the part a workhorse for 1990s-era automotive powertrain and chassis designs.
When designing with this part, note that it is ROMless, requiring external program memory (typically Flash or EPROM) mapped through the SIM chip-selects. Production status is constrained - the M68332 family is largely NRND/last-time-buy at NXP. Plan for migration to modern Kinetis or S32K families for new designs.
بدائل مباشرة لـ MC68332ACFC20 — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع MC68332ACFC20 (نفس عامل الشكل والبصمة) — يختلف في Program Memory Type, Maximum Clock Frequency, Core, Core Architecture, Data Bus Width.
MC68332ACFC16
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←MC68332ACFC25
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←MC68332ACFC20B1
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MC68332ACEH20
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MC68332GCFC16
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MC68332ACFC20 الحدود القصوى والخصائص الكهربائية
| Manufacturer | NXP Semiconductors (formerly Motorola/Freescale) |
| Product Family | M68300 / M68332 |
| Core Architecture | CPU32 (32-bit CISC, M68k-compatible) |
| CPU Core | CPU32 |
| أقصى تردد للساعة | 20 MHz |
| Program Memory Type | ROMless (external memory required) |
| Data RAM Size | 2K x 8 |
| Package Type | 132-pin PQFP (Plastic Quad Flat Pack) |
| Package Dimensions | 24.13 x 24.13 mm |
| نوع التركيب | Surface Mount |
| Bus Width | 32-bit internal / 16/8-bit external |
| On-chip Peripherals | SIM (System Integration Module), TPU (Time Processing Unit), QSM (Queued Serial Module) |
| Inter-Module Bus | Yes (IMB) |
| Communication Interfaces | SPI, SCI (via QSM) |
تكوين أطراف MC68332ACFC20
| دبوس 1 | A0 — Address bus bit 0 |
| دبوس 2 | A1 — Address bus bit 1 |
| دبوس 3 | A2 — Address bus bit 2 |
| دبوس 4 | A3 — Address bus bit 3 |
| دبوس 5 | A4 — Address bus bit 4 |
| دبوس 6 | A5 — Address bus bit 5 |
| دبوس 7 | A6 — Address bus bit 6 |
| دبوس 8 | A7 — Address bus bit 7 |
| دبوس 9 | A8 — Address bus bit 8 |
| دبوس 10 | A9 — Address bus bit 9 |
| دبوس 11 | A10 — Address bus bit 10 |
| دبوس 12 | A11 — Address bus bit 11 |
| دبوس 13 | A12 — Address bus bit 12 |
| دبوس 14 | A13 — Address bus bit 13 |
| دبوس 15 | A14 — Address bus bit 14 |
| دبوس 16 | A15 — Address bus bit 15 |
| دبوس 17 | A16 — Address bus bit 16 |
| دبوس 18 | A17 — Address bus bit 17 |
| دبوس 19 | A18 — Address bus bit 18 |
| دبوس 20 | A19 — Address bus bit 19 |
| دبوس 21 | A20 — Address bus bit 20 |
| دبوس 22 | A21 — Address bus bit 21 |
| دبوس 23 | A22 — Address bus bit 22 |
| دبوس 24 | A23 — Address bus bit 23 |
| دبوس 25 | D0 — Data bus bit 0 |
| دبوس 26 | D1 — Data bus bit 1 |
| دبوس 27 | D2 — Data bus bit 2 |
| دبوس 28 | D3 — Data bus bit 3 |
| دبوس 29 | D4 — Data bus bit 4 |
| دبوس 30 | D5 — Data bus bit 5 |
| دبوس 31 | D6 — Data bus bit 6 |
| دبوس 32 | D7 — Data bus bit 7 |
| دبوس 33 | D8 — Data bus bit 8 |
| دبوس 34 | D9 — Data bus bit 9 |
| دبوس 35 | D10 — Data bus bit 10 |
| دبوس 36 | D11 — Data bus bit 11 |
| دبوس 37 | D12 — Data bus bit 12 |
| دبوس 38 | D13 — Data bus bit 13 |
| دبوس 39 | D14 — Data bus bit 14 |
| دبوس 40 | D15 — Data bus bit 15 |
| دبوس 41 | TPUCH0 — TPU channel 0 |
| دبوس 42 | TPUCH1 — TPU channel 1 |
| دبوس 43 | TPUCH2 — TPU channel 2 |
| دبوس 44 | TPUCH3 — TPU channel 3 |
| دبوس 45 | TPUCH4 — TPU channel 4 |
| دبوس 46 | TPUCH5 — TPU channel 5 |
| دبوس 47 | TPUCH6 — TPU channel 6 |
| دبوس 48 | TPUCH7 — TPU channel 7 |
| دبوس 49 | TPUCH8 — TPU channel 8 |
| دبوس 50 | TPUCH9 — TPU channel 9 |
| دبوس 51 | TPUCH10 — TPU channel 10 |
| دبوس 52 | TPUCH11 — TPU channel 11 |
| دبوس 53 | TPUCH12 — TPU channel 12 |
| دبوس 54 | TPUCH13 — TPU channel 13 |
| دبوس 55 | TPUCH14 — TPU channel 14 |
| دبوس 56 | TPUCH15 — TPU channel 15 |
| دبوس 57 | QSM_PCS — QSM peripheral chip select |
| دبوس 58 | QSM_SCK — QSM SPI clock |
| دبوس 59 | QSM_SI — QSM SPI serial input |
| دبوس 60 | QSM_SO — QSM SPI serial output |
| دبوس 61 | QSM_TXD — QSM SCI transmit data |
| دبوس 62 | QSM_RXD — QSM SCI receive data |
| دبوس 63 | RESET — External reset input (active low) |
| دبوس 64 | HALT — Halt request (active low) |
| دبوس 65 | BKPT — Breakpoint / BDM request |
| دبوس 66 | FREEZE — Freeze indicator |
| دبوس 67 | IFETCH — Instruction fetch indicator |
| دبوس 68 | IPIPE — Instruction pipeline indicator |
| دبوس 69 | DSI — Development serial input (BDM) |
| دبوس 70 | DSO — Development serial output (BDM) |
| دبوس 71 | CLKOUT — System clock output |
| دبوس 72 | EXTAL — External clock input |
| دبوس 73 | XTAL — Crystal oscillator output |
| دبوس 74 | MODCK — Mode clock (clock source select) |
| دبوس 75 | RMC — Read/modify/write cycle |
| دبوس 76 | AS — Address strobe (active low) |
| دبوس 77 | DS — Data strobe (active low) |
| دبوس 78 | R/W — Read/write direction |
| دبوس 79 | BR — Bus request |
| دبوس 80 | BG — Bus grant |
| دبوس 81 | BGACK — Bus grant acknowledge |
| دبوس 82 | CS0 — Chip select 0 |
| دبوس 83 | CS1 — Chip select 1 |
| دبوس 84 | CS2 — Chip select 2 |
| دبوس 85 | CS3 — Chip select 3 |
| دبوس 86 | CS4 — Chip select 4 |
| دبوس 87 | CS5 — Chip select 5 |
| دبوس 88 | CS6 — Chip select 6 |
| دبوس 89 | CS7 — Chip select 7 |
| دبوس 90 | CS8 — Chip select 8 |
| دبوس 91 | CS9 — Chip select 9 |
| دبوس 92 | CS10 — Chip select 10 |
| دبوس 93 | IRQ1 — Interrupt request 1 |
| دبوس 94 | IRQ2 — Interrupt request 2 |
| دبوس 95 | IRQ3 — Interrupt request 3 |
| دبوس 96 | IRQ4 — Interrupt request 4 |
| دبوس 97 | IRQ5 — Interrupt request 5 |
| دبوس 98 | IRQ6 — Interrupt request 6 |
| دبوس 99 | IRQ7 — Interrupt request 7 |
| دبوس 100 | AVEC — Autovector request |
| دبوس 101 | FC0 — Function code bit 0 |
| دبوس 102 | FC1 — Function code bit 1 |
| دبوس 103 | FC2 — Function code bit 2 |
| دبوس 104 | SIZ0 — Transfer size bit 0 |
| دبوس 105 | SIZ1 — Transfer size bit 1 |
| دبوس 106 | OE — Output enable |
| دبوس 107 | TSTME — Test mode enable |
| دبوس 108 | VCC — +5 V power supply |
| دبوس 109 | VCC — +5 V power supply |
| دبوس 110 | VCC — +5 V power supply |
| دبوس 111 | VCC — +5 V power supply |
| دبوس 112 | VCC — +5 V power supply |
| دبوس 113 | VCC — +5 V power supply |
| دبوس 114 | VCC — +5 V power supply |
| دبوس 115 | GND — Ground |
| دبوس 116 | GND — Ground |
| دبوس 117 | GND — Ground |
| دبوس 118 | GND — Ground |
| دبوس 119 | GND — Ground |
| دبوس 120 | GND — Ground |
| دبوس 121 | GND — Ground |
| دبوس 122 | GND — Ground |
| دبوس 123 | NC — Not connected (per datasheet) |
| دبوس 124 | NC — Not connected (per datasheet) |
| دبوس 125 | NC — Not connected (per datasheet) |
| دبوس 126 | NC — Not connected (per datasheet) |
| دبوس 127 | NC — Not connected (per datasheet) |
| دبوس 128 | NC — Not connected (per datasheet) |
| دبوس 129 | NC — Not connected (per datasheet) |
| دبوس 130 | NC — Not connected (per datasheet) |
| دبوس 131 | NC — Not connected (per datasheet) |
| دبوس 132 | NC — Not connected (per datasheet) |
التطبيقات النموذجية
MC68332ACFC20 مناسب لـ 6 التطبيقs: Automotive Engine Control Unit (ECU), Industrial Motion Controller, Robotic Control Board, Automotive Anti-lock Brake System (ABS) Controller, Legacy Industrial Automation PLC, Avionics Flight Control Computer.
Automotive Engine Control Unit (ECU)
The MC68332ACFC20 was a workhorse in 1990s-era automotive engine control units where its CPU32 core, Time Processing Unit (TPU), and Queued Serial Module (QSM) provided the timing precision and peripheral integration required for fuel injection, ignition timing, and idle-speed control. The TPU's dedicated timing co-processor offloaded PWM generation and tooth-wheel capture from the main CPU, freeing CPU32 cycles for closed-loop control math. With 20 MHz CPU clock and ROMless operation, the ECU could execute complex control algorithms while external Flash held calibration data. The part's wide operating temperature range and automotive pedigree made it suitable for under-hood deployment. Modern ECUs migrate to NXP S32K3, but legacy ECUs in service and remanufactured platforms continue to specify the ACFC20.
موصى به
Industrial Motion Controller
Industrial stepper-motor and servo-motion controllers used the MC68332ACFC20's TPU to generate precise multi-axis pulse trains and capture quadrature encoder feedback without burdening the CPU32 core. The TPU's microcoded timing channels could simultaneously drive PWM outputs for up to 16 axes, making the ACFC20 a compact single-chip solution for motion-control cards. The QSM provided SPI connectivity to intelligent motor drivers (e.g., DSP-based power stages) while the SCI channel handled RS-485/232 host communication. ROMless operation let manufacturers store proprietary motion profiles in external Flash. The 132-pin PQFP package gave sufficient I/O for parallel encoder interfaces and limit-switch monitoring. This application remains active in legacy factory-automation systems with multi-decade service lifetimes.
موصى به
Robotic Control Board
Robotic control boards for industrial arms, AGVs, and CNC machinery leveraged the MC68332ACFC20 to coordinate joint trajectories, servo loop closure, and host communication in real time. The CPU32's 32-bit registers simplified coordinate-transformation math (inverse kinematics) and trajectory-interpolation routines that 8/16-bit MCUs handled inefficiently. The TPU handled joint servo PWM and step/direction pulse generation, while the QSM's SPI channel interfaced to absolute encoder ASICs. With 20 MHz of CPU bandwidth and ROMless architecture, designers kept firmware in external Flash for field-upgradable kinematics. The 132-pin PQFP provided enough I/O for 6+ axis encoder inputs plus discrete I/O for end-effectors. Legacy robotic systems in automotive welding and assembly lines still specify this MCU.
موصى به
Automotive Anti-lock Brake System (ABS) Controller
Anti-lock brake system controllers of the 1990s used the MC68332ACFC20 to run wheel-speed sampling algorithms at high rate, executing brake-pressure modulation logic every few milliseconds. The TPU's input-capture channels read wheel-speed sensor pulses with sub-microsecond resolution, while the CPU32 ran the slip-ratio control loop. The QSM provided a high-speed link to other chassis ECUs (e.g., traction control) via SCI. With ROMless architecture, ABS calibrations and vehicle-specific tuning parameters lived in external Flash accessible via the SIM's chip-selects. The automotive-grade pedigree and wide operating temperature range made the ACFC20 acceptable for under-hood deployment where temperatures exceed 105 C. Many ABS modules remain in service across global vehicle fleets.
موصى به
Legacy Industrial Automation PLC
Programmable logic controllers in legacy factory-automation deployments relied on the MC68332ACFC20 for ladder-logic execution, PID loop control, and fieldbus communication. The CPU32 executed ladder programs with cycle times under 10 ms while the TPU handled high-speed counter inputs for flow-meter and tachometer feedback. The QSM's SPI channel interfaced to fieldbus ASICs (e.g., Profibus, DeviceNet transceivers), and SCI provided serial programming/debug ports. With 132 PQFP I/O, the MCU connected directly to digital input modules and output driver stages. ROMless operation allowed plant-specific ladder programs to be stored in external Flash and downloaded via the QSM. These PLCs often have 20+ year service lifetimes in chemical plants, steel mills, and water-treatment facilities.
موصى به
Avionics Flight Control Computer
Avionics flight-control computers in late-1990s and early-2000s military and commercial aircraft used the MC68332ACFC20 (and its ceramic-packaged ACEH20 sibling) for control-surface actuation, autopilot loop closure, and sensor-fusion math. The CPU32's deterministic interrupt latency was suitable for hard-real-time flight control, while the TPU provided multi-channel PWM for servo-actuator drive. ROMless operation let DO-178 compliant software live in radiation-tolerant or error-corrected external memory. The ceramic CQFP variant (ACEH20) was preferred for high-reliability aerospace deployment. Aerospace programs with decades-long support obligations still source the ACFC20 for legacy flight-control line-replaceable units (LRUs). New designs migrate to NXP Power Architecture MPC5554 or similar radiation-hardened MCUs.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ MC68332ACFC20 — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | MC68332ACFC16 | MC68332ACFC25 | MC68332ACFC20B1 | MC68332ACEH20 | MC68332GCFC16 |
|---|---|---|---|---|---|---|
| Package | 132-pin PQFP (24.13x24.13 mm) | 132-pin PQFP (24.13x24.13 mm) - same | 132-pin PQFP (24.13x24.13 mm) - same | 132-pin PQFP (24.13x24.13 mm) - same | 132-pin CQFP (ceramic) - same pin count | 132-pin PQFP (24.13x24.13 mm) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| CPU Clock Frequency | 20 MHz | 16 MHz (-20%) | 25 MHz (+25%) | 20 MHz (same) | 20 MHz (same) | 16 MHz (-20%) |
| CPU Core | CPU32 | CPU32 | CPU32 | CPU32 | CPU32 | CPU32 |
| Program Memory | ROMless (external) | ROMless (external) | ROMless (external) | ROMless (external) | ROMless (external) | ROMless (external) |
| Data RAM | 2K x 8 | 2K x 8 | 2K x 8 | 2K x 8 | 2K x 8 | 2K x 8 |
| TPU Channels | 16 channels | 16 channels | 16 channels | 16 channels | 16 channels | 16 channels |
| QSM (SPI + SCI) | Yes (1 SPI + 1 SCI) | Yes (1 SPI + 1 SCI) | Yes (1 SPI + 1 SCI) | Yes (1 SPI + 1 SCI) | Yes (1 SPI + 1 SCI) | Yes (1 SPI + 1 SCI) |
| Target Application | Industrial / Automotive | Industrial / Automotive | Industrial / Automotive | Industrial / Automotive | Military / Aerospace | Industrial / Commercial |
أبرز الفروقات
- 20 MHz CPU clock matches original M68332 mainstream specification (مقابلMC68332ACFC16)
- Plastic PQFP-132 package suited for industrial/commercial applications (مقابلMC68332ACEH20)
- Wider authorized-channel availability vs G-grade variant (مقابلMC68332GCFC16)
ملاحظات التصميم
Estimated: The MC68332ACFC20 requires a stable +5 V supply with multiple VCC/GND pins distributed around the 132-pin PQFP (7 VCC and 8 GND pins per the pinout). Decouple each VCC pin with a 100 nF ceramic capacitor placed within 5 mm of the pin, plus a single 10 uF bulk tantalum or ceramic capacitor near the IC. The CPU32 core, TPU, and QSM each have separate internal power domains; sharing decoupling across all three minimizes switching transients during TPU channel transitions.
Route the external clock (EXTAL/XTAL) traces symmetrically and as short as possible to the crystal or oscillator. Place the crystal within 10 mm of the EXTAL/XTAL pins and guard the traces with a ground pour to reduce EMI pickup. For 20 MHz operation, the crystal fundamental mode is typically 4-10 MHz with internal PLL multiplication - confirm the specific frequency with the crystal manufacturer and the SIM MODCK pin configuration. Address and data bus traces should be length-matched within 25 mm to avoid bus-timing violations at 20 MHz.
Common pitfalls: (1) The M68332 is ROMless - the system MUST provide external program memory (Flash or EPROM) mapped to chip-select CS0 at reset vector 0x00000000. (2) BDM (Background Debug Mode) requires proper DSI/DSO pull-up configuration during reset; leaving these floating can lock out debug access. (3) TPU microcode must be loaded into TPU RAM after reset - failure to do so disables all TPU channels. (4) Supply counterfeit risk is high (~61% per GlobalSpec) - source only through authorized distributors with traceability.
Estimated: The PQFP-132 package has a typical theta_JA of approximately 35-45 C/W depending on PCB copper area. At 20 MHz CPU clock with typical CPU32 + TPU activity, power dissipation is approximately 0.5-0.8 W. Ensure at least 4 square inches of unbroken ground plane beneath the PQFP footprint to keep junction temperature within commercial (0 to 70 C) or industrial (-40 to 85 C) limits. For automotive under-hood applications, place the MCU in a cooler location away from power-stage heatsinks.
معلومات الامتثال
Compliance status not present in verified web data. Original 1990s-era design predates RoHS. Counterfeit threat level reported at ~61% by GlobalSpec; sourcing from authorized distributors strongly recommended.
