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NXP Semiconductors MC68040RC25V-NXP
- Part No.:
- MC68040RC25V-NXP
- Manufacturer:
- NXP Semiconductors
- Category:
- Microprocessors
- Package:
- -
- Datasheet:
-
MC68040RC25V-NXP.pdf
- Description:
- MICROPROCESSOR, 32 BIT, MC68000
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Product details
Overview
MC68040RC25V-NXP from NXP (formerly Motorola) is a 32-bit third-generation microprocessor with integrated integer unit, MMU, dual 4-KB instruction and data caches, and on-chip floating-point unit (FPU). It operates at 25 MHz, supports 32-bit address/data buses, and implements full M68000 family instruction set compatibility. It was used in high-end embedded workstations, laser printers, and real-time industrial controllers requiring deterministic interrupt response and memory protection.
For engineers reviewing the MC68040RC25V-NXP datasheet, MC68040RC25V-NXP pinout, MC68040RC25V-NXP application, or MC68040RC25V-NXP equivalent, key selection criteria include FPU presence, 25 MHz clock rating, IEEE 1149.1 JTAG test support, and full MMU functionality - distinguishing it from LC/EC variants lacking FPU or MMU.
Technical Context
The MC68040RC25V-NXP implements a five-stage integer pipeline with dynamic branch prediction and executes instructions at up to 25 million instructions per second (MIPS). Its Memory Management Unit (MMU) supports hierarchical translation tables with supervisor/user privilege separation, write protection, and transparent translation for legacy code compatibility.
The integrated FPU conforms to IEEE 754-1985 single/double-precision arithmetic and includes dedicated exception handling for underflow, overflow, SNAN, and operand errors. Cache coherency is maintained via snoop protocol support and explicit cache control instructions (PFLUSH, PTEST, MOVEC).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Clock Frequency | 25 MHz - defines maximum sustained instruction throughput and bus cycle timing for synchronous peripheral interfacing. |
| Address Bus Width | 32-bit - enables linear addressing of up to 4 GB of physical memory space without segmentation. |
| Data Bus Width | 32-bit - supports single-cycle transfers of long words, reducing memory access overhead in burst-sensitive applications. |
| Instruction Cache | 4 KB unified, write-through or copyback - reduces average instruction fetch latency and decouples CPU execution from memory bandwidth limitations. |
| Floating-Point Unit | Integrated IEEE 754-compliant FPU - eliminates need for external coprocessor in math-intensive tasks like motion control or image processing. |
| MMU Support | Full hardware MMU with translation lookaside buffers (TLBs) - enables protected multitasking OS environments such as VxWorks or early Linux ports. |
| JTAG Interface | IEEE 1149.1 compliant TAP controller - allows boundary-scan testing, debug access, and in-circuit emulation without intrusive probes. |
Pinout & Package
MC68040RC25V-NXP is housed in a 179-pin ceramic pin grid array (CPGA) package with 1.27 mm pitch, designed for high-reliability industrial and telecom applications. Thermal and mechanical data confirm compliance with MIL-STD-883 Class B requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A31–A0 | Address Bus Outputs | 32-bit multiplexed address lines used during bus cycles to select memory or I/O locations; latched externally using ALE or DLE signal. |
| D31–D0 | Data Bus Bidirectional I/O | 32-bit bidirectional data path supporting byte/word/long-word transfers; direction controlled by R/W and transfer size signals. |
| R/W | Read/Write Control | Active-high indicates read operation; active-low indicates write - synchronizes data flow direction with bus cycle phase. |
| TS | Transfer Start Strobe | Output pulse signaling start of a bus cycle; used by peripherals to initiate address decoding and prepare for data transfer. |
| TA | Transfer Acknowledge | Input indicating bus master has completed current cycle; required for synchronous bus timing and wait-state insertion. |
| TCK/TMS/TDI/TDO | JTAG Test Access Port | Standard IEEE 1149.1 interface enabling boundary scan, device identification, and debug access without halting CPU operation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated MMU with TLB | Enables hardware-enforced memory protection, virtual memory mapping, and task isolation - critical for real-time OS deployment. |
| Dual independent 4-KB caches | Reduces average memory access time by >70% for typical instruction/data access patterns, improving deterministic execution timing. |
| Floating-point unit (FPU) | Executes IEEE 754 single/double-precision operations in hardware, avoiding software emulation latency in control algorithms. |
| IEEE 1149.1 JTAG support | Permits non-intrusive board-level test, in-system programming verification, and debug trace without dedicated debug headers. |
| Bus snooping protocol | Allows coherent multi-processor configurations by detecting and invalidating stale cache entries across shared memory systems. |
Applications
| Laser Printer Engine Control | Industrial Motion Controller |
|---|---|
Use Scenario: Real-time raster image processing, font rendering, and motor timing synchronization in high-speed page output. IC Role / Device Role / Timing Role: Main system controller executing firmware with hard real-time deadlines for laser diode firing and paper feed coordination. Use Value: Integrated MMU ensures safe isolation between print job processing and low-level motor control threads; FPU accelerates Bezier curve interpolation for smooth vector graphics rendering. |
Use Scenario: Closed-loop servo control of multi-axis CNC machines with synchronized analog I/O and encoder feedback. IC Role / Device Role / Timing Role: Central deterministic processor managing PID loop execution, trajectory planning, and safety monitoring at sub-millisecond intervals. Use Value: 25 MHz clock and pipelined integer unit deliver consistent interrupt latency; dual caches minimize jitter from memory contention during simultaneous I/O and computation. |
| Network Router Forwarding Engine | Medical Imaging Workstation |
Use Scenario: Packet classification, header modification, and ACL enforcement in early Ethernet-to-FDDI bridging systems. IC Role / Device Role / Timing Role: Embedded network processor handling Layer 2/3 forwarding decisions with minimal external memory dependency. Use Value: On-chip caches reduce reliance on slow DRAM for lookup table access; JTAG enables field-upgradable firmware without disassembly. |
Use Scenario: DICOM image reconstruction, window-level adjustment, and display buffering in ultrasound and CT console systems. IC Role / Device Role / Timing Role: High-precision computational engine performing floating-point FFTs and matrix transforms on acquired sensor data. Use Value: Integrated IEEE 754 FPU ensures bit-accurate reproducibility across reboots; MMU prevents diagnostic software from corrupting real-time acquisition buffers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microprocessor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC68040RC33V-NXP | 33 MHz clock rating; identical architecture, pinout, and feature set. | Higher throughput for compute-bound tasks; requires tighter timing margins on bus interfaces and power delivery. | Select when deterministic 33 MHz operation is required and system timing budget permits faster clock domain synchronization. |
| MC68LC040RC25V-NXP | Omits FPU and uses lower-power process; otherwise identical instruction set and pinout. | Suitable for cost-sensitive embedded control where floating-point math is emulated or unnecessary. | Choose when FPU is unused and thermal/power constraints favor reduced die complexity and dissipation. |
Compared with MC68040RC25V-NXP, the RC33V offers +32% clock speed with identical features, while the LC040RC25V removes FPU to cut cost and power - making each suitable for distinct performance vs. efficiency trade-offs in legacy M68K-based designs.
Availability
MC68040RC25V-NXP is available at Aetrix Electronics and suitable for laser printer engine control, industrial motion controllers, network router forwarding engines, and medical imaging workstations requiring stable component supply and long-term obsolescence management.
Supply support for MC68040RC25V-NXP 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
NXP Semiconductors, formerly Motorola Semiconductor, is a global leader in high-reliability microcontrollers and legacy processor solutions, with deep heritage in industrial, automotive, and communications silicon.
The MC68040RC25V-NXP belongs to the M68000 family's third-generation microprocessor line, designed for embedded systems demanding full 32-bit computing, memory protection, and real-time determinism without external coprocessors.
FAQ
What is the maximum operating frequency of the MC68040RC25V-NXP?
The MC68040RC25V-NXP is rated for a maximum clock frequency of 25 MHz, as specified in its electrical characteristics section. This rating applies under standard industrial temperature and voltage conditions (−40°C to +85°C, 5.0 V ±5%). Exceeding this frequency may result in timing violations, cache coherency loss, or undefined instruction execution behavior. The MC68040RC25V-NXP does not support dynamic frequency scaling or overclocking modes.
Does the MC68040RC25V-NXP include an integrated floating-point unit?
Yes, the MC68040RC25V-NXP includes a fully integrated IEEE 754-compliant floating-point unit (FPU), unlike the MC68LC040 or MC68EC040 variants. This FPU supports single- and double-precision arithmetic, exception handling for overflow, underflow, and SNAN, and direct integration with the integer pipeline. The MC68040RC25V-NXP FPU eliminates the need for external coprocessors in applications requiring real-time floating-point computation.
Is the MC68040RC25V-NXP pin-compatible with other M68040 variants?
Yes, the MC68040RC25V-NXP shares identical pinout and package (179-pin CPGA) with MC68040RC33V-NXP, MC68LC040RC25V-NXP, and MC68EC040RC25V-NXP. However, functional differences exist: the MC68LC040RC25V-NXP omits the FPU, and the MC68EC040RC25V-NXP lacks both FPU and MMU. Pin compatibility enables drop-in replacement only when target application requirements align with the variant's feature set.
What debug and test capabilities does the MC68040RC25V-NXP provide?
The MC68040RC25V-NXP integrates a full IEEE 1149.1 JTAG test access port (TAP) with boundary-scan support, enabling in-circuit testing, device identification, and non-intrusive debugging. It supports EXTEST, SAMPLE/PRELOAD, and HIGHZ instructions, and includes a BSDL description (v2.2) for automated test generation. The MC68040RC25V-NXP does not require external debug pods for basic visibility into internal register states or bus activity during development.
How does the MMU in the MC68040RC25V-NXP support real-time operating systems?
The MMU in the MC68040RC25V-NXP provides hardware-enforced memory protection through supervisor/user privilege separation, write protection bits, and transparent translation registers. These features allow real-time OS kernels to isolate application tasks, prevent unauthorized memory access, and manage virtual-to-physical address mapping without software overhead. The MC68040RC25V-NXP MMU is essential for deploying certified RTOSes like VxWorks or Integrity in safety-critical embedded systems.
MC68040RC25V-NXP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- -
- Series:
- *
- Packaging:
- Bulk
- Product Status:
- Active
- Core Processor:
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MC68040RC25V-NXP FAQ
1.How can I place an order for MC68040RC25V-NXP through Aetrix?
Please submit a Request for Quotation (RFQ) for MC68040RC25V-NXP 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 MC68040RC25V-NXP reliable?
The price and inventory of MC68040RC25V-NXP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC68040RC25V-NXP is usually 5 days.
3.What payment methods are accepted for MC68040RC25V-NXP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC68040RC25V-NXP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC68040RC25V-NXP?
MC68040RC25V-NXP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC68040RC25V-NXP 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 MC68040RC25V-NXP?
For technical support, including MC68040RC25V-NXP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC68040RC25V-NXP requirements.
6.How does Aetrix verify that MC68040RC25V-NXP is sourced from the original manufacturer or authorized distributors?
All MC68040RC25V-NXP 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 MC68040RC25V-NXP meets industry standards.
7.What is the process for return or replacement of MC68040RC25V-NXP?
All MC68040RC25V-NXP units undergo pre-shipment inspection (PSI). If there is an issue with MC68040RC25V-NXP, 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 MC68040RC25V-NXP part is unused and in its original packaging.
Return procedure for MC68040RC25V-NXP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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