MC68332ACFC20 - 32-Bit CPU32 MCU, 20MHz, 132-PQFP | NXP
MPN: MC68332ACFC20 ✗ סוף ייצורMC68332ACFC20 סקירה
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.
חלופות תחליף ישיר עבור MC68332ACFC20 — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם MC68332ACFC20 (אותו גורם צורה וטביעת רגל) — שונים ב Program Memory Type, Maximum Clock Frequency, Core, Core Architecture, Data Bus Width.
MC68332ACFC16
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←MC68332ACFC25
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←MC68332ACFC20B1
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
MC68332ACEH20
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
MC68332GCFC16
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
MC68332ACFC20 דירוגים מרביים ומאפיינים חשמליים
| Manufacturer | NXP Semiconductors (formerly Motorola/Freescale) |
| Product Family | M68300 / M68332 |
| Core Architecture | CPU32 (32-bit CISC, M68k-compatible) |
| CPU Core | CPU32 |
| תדר שעון מקסימלי | 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 |
| סוג הרכבה | 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) |
תצורת פינים של MC68332ACFC20
| פין 1 | A0 — Address bus bit 0 |
| פין 2 | A1 — Address bus bit 1 |
| פין 3 | A2 — Address bus bit 2 |
| פין 4 | A3 — Address bus bit 3 |
| פין 5 | A4 — Address bus bit 4 |
| פין 6 | A5 — Address bus bit 5 |
| פין 7 | A6 — Address bus bit 6 |
| פין 8 | A7 — Address bus bit 7 |
| פין 9 | A8 — Address bus bit 8 |
| פין 10 | A9 — Address bus bit 9 |
| פין 11 | A10 — Address bus bit 10 |
| פין 12 | A11 — Address bus bit 11 |
| פין 13 | A12 — Address bus bit 12 |
| פין 14 | A13 — Address bus bit 13 |
| פין 15 | A14 — Address bus bit 14 |
| פין 16 | A15 — Address bus bit 15 |
| פין 17 | A16 — Address bus bit 16 |
| פין 18 | A17 — Address bus bit 17 |
| פין 19 | A18 — Address bus bit 18 |
| פין 20 | A19 — Address bus bit 19 |
| פין 21 | A20 — Address bus bit 20 |
| פין 22 | A21 — Address bus bit 21 |
| פין 23 | A22 — Address bus bit 22 |
| פין 24 | A23 — Address bus bit 23 |
| פין 25 | D0 — Data bus bit 0 |
| פין 26 | D1 — Data bus bit 1 |
| פין 27 | D2 — Data bus bit 2 |
| פין 28 | D3 — Data bus bit 3 |
| פין 29 | D4 — Data bus bit 4 |
| פין 30 | D5 — Data bus bit 5 |
| פין 31 | D6 — Data bus bit 6 |
| פין 32 | D7 — Data bus bit 7 |
| פין 33 | D8 — Data bus bit 8 |
| פין 34 | D9 — Data bus bit 9 |
| פין 35 | D10 — Data bus bit 10 |
| פין 36 | D11 — Data bus bit 11 |
| פין 37 | D12 — Data bus bit 12 |
| פין 38 | D13 — Data bus bit 13 |
| פין 39 | D14 — Data bus bit 14 |
| פין 40 | D15 — Data bus bit 15 |
| פין 41 | TPUCH0 — TPU channel 0 |
| פין 42 | TPUCH1 — TPU channel 1 |
| פין 43 | TPUCH2 — TPU channel 2 |
| פין 44 | TPUCH3 — TPU channel 3 |
| פין 45 | TPUCH4 — TPU channel 4 |
| פין 46 | TPUCH5 — TPU channel 5 |
| פין 47 | TPUCH6 — TPU channel 6 |
| פין 48 | TPUCH7 — TPU channel 7 |
| פין 49 | TPUCH8 — TPU channel 8 |
| פין 50 | TPUCH9 — TPU channel 9 |
| פין 51 | TPUCH10 — TPU channel 10 |
| פין 52 | TPUCH11 — TPU channel 11 |
| פין 53 | TPUCH12 — TPU channel 12 |
| פין 54 | TPUCH13 — TPU channel 13 |
| פין 55 | TPUCH14 — TPU channel 14 |
| פין 56 | TPUCH15 — TPU channel 15 |
| פין 57 | QSM_PCS — QSM peripheral chip select |
| פין 58 | QSM_SCK — QSM SPI clock |
| פין 59 | QSM_SI — QSM SPI serial input |
| פין 60 | QSM_SO — QSM SPI serial output |
| פין 61 | QSM_TXD — QSM SCI transmit data |
| פין 62 | QSM_RXD — QSM SCI receive data |
| פין 63 | RESET — External reset input (active low) |
| פין 64 | HALT — Halt request (active low) |
| פין 65 | BKPT — Breakpoint / BDM request |
| פין 66 | FREEZE — Freeze indicator |
| פין 67 | IFETCH — Instruction fetch indicator |
| פין 68 | IPIPE — Instruction pipeline indicator |
| פין 69 | DSI — Development serial input (BDM) |
| פין 70 | DSO — Development serial output (BDM) |
| פין 71 | CLKOUT — System clock output |
| פין 72 | EXTAL — External clock input |
| פין 73 | XTAL — Crystal oscillator output |
| פין 74 | MODCK — Mode clock (clock source select) |
| פין 75 | RMC — Read/modify/write cycle |
| פין 76 | AS — Address strobe (active low) |
| פין 77 | DS — Data strobe (active low) |
| פין 78 | R/W — Read/write direction |
| פין 79 | BR — Bus request |
| פין 80 | BG — Bus grant |
| פין 81 | BGACK — Bus grant acknowledge |
| פין 82 | CS0 — Chip select 0 |
| פין 83 | CS1 — Chip select 1 |
| פין 84 | CS2 — Chip select 2 |
| פין 85 | CS3 — Chip select 3 |
| פין 86 | CS4 — Chip select 4 |
| פין 87 | CS5 — Chip select 5 |
| פין 88 | CS6 — Chip select 6 |
| פין 89 | CS7 — Chip select 7 |
| פין 90 | CS8 — Chip select 8 |
| פין 91 | CS9 — Chip select 9 |
| פין 92 | CS10 — Chip select 10 |
| פין 93 | IRQ1 — Interrupt request 1 |
| פין 94 | IRQ2 — Interrupt request 2 |
| פין 95 | IRQ3 — Interrupt request 3 |
| פין 96 | IRQ4 — Interrupt request 4 |
| פין 97 | IRQ5 — Interrupt request 5 |
| פין 98 | IRQ6 — Interrupt request 6 |
| פין 99 | IRQ7 — Interrupt request 7 |
| פין 100 | AVEC — Autovector request |
| פין 101 | FC0 — Function code bit 0 |
| פין 102 | FC1 — Function code bit 1 |
| פין 103 | FC2 — Function code bit 2 |
| פין 104 | SIZ0 — Transfer size bit 0 |
| פין 105 | SIZ1 — Transfer size bit 1 |
| פין 106 | OE — Output enable |
| פין 107 | TSTME — Test mode enable |
| פין 108 | VCC — +5 V power supply |
| פין 109 | VCC — +5 V power supply |
| פין 110 | VCC — +5 V power supply |
| פין 111 | VCC — +5 V power supply |
| פין 112 | VCC — +5 V power supply |
| פין 113 | VCC — +5 V power supply |
| פין 114 | VCC — +5 V power supply |
| פין 115 | GND — Ground |
| פין 116 | GND — Ground |
| פין 117 | GND — Ground |
| פין 118 | GND — Ground |
| פין 119 | GND — Ground |
| פין 120 | GND — Ground |
| פין 121 | GND — Ground |
| פין 122 | GND — Ground |
| פין 123 | NC — Not connected (per datasheet) |
| פין 124 | NC — Not connected (per datasheet) |
| פין 125 | NC — Not connected (per datasheet) |
| פין 126 | NC — Not connected (per datasheet) |
| פין 127 | NC — Not connected (per datasheet) |
| פין 128 | NC — Not connected (per datasheet) |
| פין 129 | NC — Not connected (per datasheet) |
| פין 130 | NC — Not connected (per datasheet) |
| פין 131 | NC — Not connected (per datasheet) |
| פין 132 | NC — Not connected (per datasheet) |
יישומים טיפוסיים
MC68332ACFC20 מתאים עבור 6 יישוםs: 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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור MC68332ACFC20 — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | 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 |
מבדילים עיקריים
- 20 MHz CPU clock matches original M68332 mainstream specification (לעומתMC68332ACFC16)
- Plastic PQFP-132 package suited for industrial/commercial applications (לעומתMC68332ACEH20)
- Wider authorized-channel availability vs G-grade variant (לעומתMC68332GCFC16)
הערות תכנון
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.
מידע על תאימות
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.
