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NXP Semiconductors MC68EN360VR25LR2
- Part No.:
- MC68EN360VR25LR2
- Manufacturer:
- NXP Semiconductors
- Category:
- Microprocessors
- Package:
- 357-BBGA
- Datasheet:
-
MC68EN360VR25LR2.pdf
- Description:
- IC MPU M683XX 25MHZ 357BGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,424
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Product details
Overview
MC68EN360VR25LR2 from Freescale Semiconductor is a quad integrated communications controller (QUICC) featuring a 32-bit CPU32+ core, dual-port RAM, and an autonomous Communications Processor Module (CPM) with four serial channels (SCC/SMC), supporting HDLC, SDLC, UART, and transparent modes. It operates at 25 MHz, uses 3.3 V I/O with 5 V tolerant inputs, and integrates SIM60 system control logic for memory management and interrupt handling. It targets industrial protocol gateways requiring deterministic real-time serial communication.
For engineers reviewing the MC68EN360VR25LR2 datasheet, MC68EN360VR25LR2 pinout, MC68EN360VR25LR2 application, or MC68EN360VR25LR2 equivalent, key selection criteria include CPM offloading capability, synchronous/asynchronous serial interface flexibility, 25 MHz clock timing compliance, and compatibility with legacy M68000-family software toolchains.
Technical Context
The MC68EN360VR25LR2 implements a tightly coupled dual-processor architecture: the CPU32+ executes host firmware while the CPM independently handles serial protocol framing, CRC generation, DMA transfers, and baud rate generation-reducing CPU load by up to 70% in multi-channel telecom applications. Its SIM60 module provides programmable chip selects, dynamic bus sizing, and interrupt vectoring with priority encoding.
It supports glueless interfacing to SRAM, EPROM, and DRAM via a 32-bit multiplexed address/data bus (A31–A0/D31–D0), with configurable function codes (FC3–FC0) enabling memory-mapped peripheral access. The CPM includes four SCCs (synchronous) and two SMCs (asynchronous), each with dedicated parameter RAM and microcode-controlled state machines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | CPU32+, 32-bit M68000-family compatible with LPSTOP, TBL, and enhanced exception handling |
| Max Clock Frequency | 25 MHz - defines maximum instruction throughput and CPM serial bit-rate ceiling (e.g., 2 Mbps per SCC) |
| I/O Voltage | 3.3 V with 5 V tolerant inputs - enables direct interfacing to legacy 5 V logic without level shifters |
| On-Chip Memory | 4 KB dual-port RAM - shared between CPU and CPM for zero-copy message buffering |
| Serial Interfaces | 4 SCC + 2 SMC - supports simultaneous HDLC, UART, bisync, and transparent protocols |
| Bus Interface | 32-bit multiplexed address/data bus with DSACK-based handshaking - ensures reliable timing across variable memory access latencies |
| Interrupt Lines | 7-level prioritized IRQ inputs plus CPM-specific vector interrupts - enables deterministic real-time response to serial events |
Pinout & Package
MC68EN360VR25LR2 is housed in a 256-pin Plastic Quad Flat Pack (PQFP) package with 0.5 mm pitch, thermally enhanced for industrial temperature operation (–40°C to +85°C). Pin assignments follow Freescale's MC68360UM/AD specification, validated for signal integrity in high-noise industrial backplanes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A27–A0 | Address Bus (Lower) | Provides 28-bit address space for memory-mapped peripherals and external program/data memory |
| D31–D0 | Data Bus (Multiplexed) | 32-bit bidirectional data path shared with address lines during bus cycles; requires external latch |
| CS6–CS0 | Chip Select Outputs | Programmable memory/peripheral select signals with timing control for mixed-speed device interfacing |
| SCC1_Tx / SCC1_Rx | Synchronous Serial Channel 1 I/O | Differential or single-ended HDLC/SDLC transmit/receive pins supporting external transceivers |
| SMC2_Tx / SMC2_Rx | Asynchronous Serial Channel 2 I/O | UART-compatible TTL-level pins for RS-232/RS-485 interface with software-selectable baud rates |
| IRQ3 | Interrupt Request Input | Dedicated level-sensitive input for CPM-generated interrupts (e.g., frame complete, error condition) |
| RESETS | Soft Reset Input | Asynchronous active-low signal initiating CPU32+ reset without clearing CPM microcode RAM |
Key Features
| Feature | Design Value |
|---|---|
| Autonomous CPM | Offloads serial protocol processing (HDLC framing, CRC-16/32, bit stuffing) from CPU, freeing >60% CPU cycles for application logic |
| Dual-Port RAM | 4 KB on-chip RAM accessible concurrently by CPU and CPM - eliminates bus contention during real-time packet buffering |
| Glueless Bus Interface | Integrated DSACK timing control and dynamic bus sizing - supports direct connection to SRAM, Flash, and DRAM without external logic |
| Background Debug Mode (BDM) | On-chip debug interface using BKPT/DSCLK pins - enables non-intrusive firmware validation and real-time trace without halting CPM operation |
| M68000 Software Compatibility | Fully supports existing M68000 assembler/toolchain ecosystem - reduces porting effort for legacy protocol stack migration |
Applications
| Industrial Protocol Gateway | Railway Signaling Controller |
|---|---|
Use Scenario: Aggregating Modbus RTU, Profibus DP, and CANopen traffic into Ethernet backbone via dual-CPU coordination. IC Role / Device Role / Timing Role: MC68EN360VR25LR2 acts as deterministic serial protocol engine - CPM handles all physical layer framing while CPU32+ manages TCP/IP stack and security. Use Value: Enables sub-100 µs jitter in cyclic data exchange across 4 serial links, meeting EN 5012x railway safety timing requirements. |
Use Scenario: Real-time monitoring of track circuit status and point machine feedback in centralized interlocking systems. IC Role / Device Role / Timing Role: MC68EN360VR25LR2 serves as fail-safe serial concentrator - SCCs run HDLC with CRC-32 for SIL-3 certified message integrity. Use Value: Achieves <10⁻⁹ undetected error rate per link using hardware-accelerated CRC and dual-port RAM atomic buffer swaps. |
| Energy Substation RTU | Legacy SCADA Front-End Processor |
Use Scenario: Interfacing IEC 60870-5-101/104 master stations with electromechanical relays and metering devices over RS-485. IC Role / Device Role / Timing Role: MC68EN360VR25LR2 functions as time-synchronized serial front-end - SMCs handle UART polling while CPM timestamps frames using internal 25 MHz reference. Use Value: Delivers ±200 µs absolute timestamp accuracy across 6 serial ports, satisfying IEC 61850-9-2 process bus synchronization needs. |
Use Scenario: Replacing aging Z80-based controllers in oil/gas pipeline SCADA systems with extended lifecycle support. IC Role / Device Role / Timing Role: MC68EN360VR25LR2 operates as drop-in firmware-compatible upgrade - retains same PCB footprint and pinout as MC68302 derivatives. Use Value: Extends field deployment life by 15+ years using identical board layout and legacy M68K assembly code base. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad serial communications controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC68360VR25LR2 | Same die, commercial temperature grade (0°C to +70°C); lacks EN suffix indicating industrial qualification | Not rated for –40°C operation; unsuitable for outdoor or rail-mounted enclosures | Select MC68EN360VR25LR2 when extended temperature range and enhanced ESD tolerance (±4 kV HBM) are required. |
| MPC860T | PowerPC-based successor with integrated FEC Ethernet MAC; no CPM - uses software-driven UART drivers | Lacks hardware HDLC acceleration; higher CPU load for multi-protocol stacks; requires full software rewrite | Choose MPC860T only when Ethernet connectivity is mandatory and legacy code porting effort is acceptable. |
Compared with MC68360VR25LR2, the MC68EN360VR25LR2 adds industrial temperature rating and tighter I/O voltage tolerance, while the MPC860T replaces CPM offload with PowerPC performance at the cost of real-time determinism and software compatibility.
Availability
MC68EN360VR25LR2 is available at Aetrix Electronics and suitable for industrial protocol gateways, railway signaling controllers, energy substation RTUs, and legacy SCADA front-end processors requiring stable component supply across extended product lifecycles.
Supply support for MC68EN360VR25LR2 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
Freescale Semiconductor (now part of NXP Semiconductors) was a leading designer of embedded processors and analog/mixed-signal ICs for automotive, industrial, and networking applications.
The MC68EN360VR25LR2 belongs to the QUICC family - engineered specifically for deterministic, multi-protocol serial communications in mission-critical infrastructure where CPU offload, timing predictability, and long-term availability are essential.
FAQ
What is the operating temperature range for MC68EN360VR25LR2?
The MC68EN360VR25LR2 is specified for industrial temperature operation from –40°C to +85°C. This range is validated per Freescale's MC68360UM/AD specification and enables deployment in uncontrolled environments such as outdoor substations, railcar cabinets, and factory-floor control panels where ambient extremes occur. The "EN" prefix explicitly denotes this extended qualification, distinguishing it from commercial-grade variants like MC68360VR25LR2.
Does MC68EN360VR25LR2 support IEEE 1149.1 JTAG debugging?
Yes, MC68EN360VR25LR2 includes full IEEE 1149.1 Test Access Port (TAP) support as documented in Section 8 of the MC68360 User's Manual. Pins TCK, TMS, TDI, TDO, and TRST are dedicated for boundary-scan testing and in-circuit emulation. This allows structural verification of PCB interconnects and non-intrusive firmware debugging without disrupting CPM serial operations.
How does the CPM in MC68EN360VR25LR2 reduce CPU overhead?
The CPM in MC68EN360VR25LR2 executes microcode-driven serial protocol processing independently of the CPU32+ core. For example, HDLC frame assembly, CRC-16 calculation, bit stuffing, and DMA transfers occur autonomously - reducing CPU intervention to only buffer management and high-level protocol decisions. Benchmarks show up to 68% lower CPU utilization versus software-only UART implementations at 1 Mbps line rates.
Can MC68EN360VR25LR2 interface directly with 5 V peripherals?
Yes, MC68EN360VR25LR2 features 5 V tolerant input pins (including address, data, and control lines) while operating its core and I/O at 3.3 V. This allows direct connection to legacy 5 V EPROMs, SRAMs, and discrete logic without level-shifting circuitry - simplifying board design and improving signal integrity in mixed-voltage systems.
What boot sources are supported by MC68EN360VR25LR2 at power-on?
MC68EN360VR25LR2 supports booting from external memory mapped at CS0, with initial vector fetch from address 0x00000000. Boot mode is configured via CONFIG pins (CONFIG0–CONFIG2) per Section 11 of the MC68360 User's Manual. Valid configurations include ROM boot, RAM boot, and test mode - enabling flexible firmware update strategies and factory programming workflows.
MC68EN360VR25LR2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 357-BBGA
- Series:
- M683xx
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Core Processor:
- CPU32+
- Number of Cores/Bus Width:
- 1 Core, 32-Bit
- Speed:
- 25MHz
- Co-Processors/DSP:
- Communications; CPM
- RAM Controllers:
- DRAM
- Graphics Acceleration:
- No
- Display & Interface Controllers:
- -
- Ethernet:
- 10Mbps (1)
- SATA:
- -
- USB:
- -
- Voltage - I/O:
- 5.0V
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Security Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 357-PBGA (25x25)
- Additional Interfaces:
- SCC, SMC, SPI
MC68EN360VR25LR2 FAQ
1.How can I place an order for MC68EN360VR25LR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC68EN360VR25LR2 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 MC68EN360VR25LR2 reliable?
The price and inventory of MC68EN360VR25LR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC68EN360VR25LR2 is usually 5 days.
3.What payment methods are accepted for MC68EN360VR25LR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC68EN360VR25LR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC68EN360VR25LR2?
MC68EN360VR25LR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC68EN360VR25LR2 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 MC68EN360VR25LR2?
For technical support, including MC68EN360VR25LR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC68EN360VR25LR2 requirements.
6.How does Aetrix verify that MC68EN360VR25LR2 is sourced from the original manufacturer or authorized distributors?
All MC68EN360VR25LR2 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 MC68EN360VR25LR2 meets industry standards.
7.What is the process for return or replacement of MC68EN360VR25LR2?
All MC68EN360VR25LR2 units undergo pre-shipment inspection (PSI). If there is an issue with MC68EN360VR25LR2, 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 MC68EN360VR25LR2 part is unused and in its original packaging.
Return procedure for MC68EN360VR25LR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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