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NXP Semiconductors MCF51CN128CLH
- Part No.:
- MCF51CN128CLH
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
MCF51CN128CLH.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:533
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Product details
Overview
MCF51CN128CLH from NXP Semiconductors (formerly Freescale) is a 32-bit ColdFire V1 microcontroller with integrated 10/100 BASE-T/TX Fast Ethernet Controller (FEC), Media Independent Interface (MII), and Mini-FlexBus external bus interface. It operates up to 50.33 MHz at 3.6–3.0 V, features 128 KB Flash and 24 KB RAM, and supports low-power stop/wait modes with 6 μs wake-up from stop3 - designed for industrial ethernet gateways and embedded networking edge devices.
For engineers reviewing the MCF51CN128CLH datasheet, MCF51CN128CLH pinout, MCF51CN128CLH application, or MCF51CN128CLH equivalent, key selection criteria include FEC DMA capability, MII PHY interfacing, Mini-FlexBus glueless memory expansion, 12-channel 12-bit ADC operation down to 1.8 V, and RGPIO support for high-speed I/O toggling in real-time control loops.
Technical Context
The MCF51CN128CLH implements the ColdFire V1 ISA_C instruction set with 0.94 Dhrystone MIPS/MHz from internal RAM, supporting up to 45 peripheral interrupts and 7 software interrupts. Its FEC operates in bus-mastering DMA mode with half/full-duplex support and requires 3.0–3.6 V supply, while MII provides clocked serial management (MDIO/MDC) and synchronous data paths to external PHYs.
Power management includes two stop modes (one permitting RTC/ADC/KBI activity), reduced-power wait mode with active FEC DMA, and programmable peripheral clock gating. The Multi-Purpose Clock Generator (MCG) offers FLL (0.2% resolution) and PLL options, and the low-power 1 kHz internal oscillator enables cyclic wake-up in all MCU modes without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ColdFire V1 (ISA_C); 50.33 MHz max @ 3.6–3.0 V, 40 MHz @ 3.0–2.1 V, 20 MHz @ 2.1–1.8 V - enables scalable performance across voltage rails |
| Memory | 128 KB on-chip Flash (read/program/erase over full VDD/temp), 24 KB RAM - supports secure boot, firmware updates, and real-time data buffering |
| Ethernet Interface | FEC + MII; 10/100 BASE-T/TX, bus-mastering DMA, half/full duplex - eliminates host CPU overhead for packet handling and enables deterministic latency |
| External Bus | Mini-FlexBus; supports up to 1 MB asynchronous memories, glueless interface to standard chip-selected peripherals - reduces BOM count and PCB complexity |
| ADC | 12-channel, 12-bit; 2.5 μs conversion time, internal bandgap reference, temp sensor (1.7 mV/°C), functional in stop3 mode - enables battery-powered sensor monitoring without wake-up penalty |
| Low-Power Modes | Stop3 (6 μs wake-up), reduced-power wait (FEC DMA active), peripheral clock gating - achieves sub-μA retention current with selective module enablement |
| I/O & Timing | 70 GPIO (muxed), 16 Rapid GPIO (set/clear/toggle), RTC with 1 kHz internal oscillator, 2× TPM (3-channel each), 3× SCI, 2× SPI, 2× I²C - supports multi-protocol gateway and time-critical control |
Pinout & Package
Package: 48-pin QFN (7 mm × 7 mm), exposed pad, copper-wire bonded (98ASA00466D). Pinout validated per Freescale Document MCF51CN128 Rev. 4, Figure 4 and Table 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PTA0/PHYCLK | Ethernet PHY clock input | Accepts 25 MHz reference from external PHY; synchronizes MII data transfers and enables precise timing alignment |
| PTA1/MII_MDIO & PTA2/MII_MDC | MII management interface | Serial bidirectional MDIO + clocked MDC for PHY register configuration and status polling without CPU intervention |
| PTB0–PTB7, PTA3–PTA7, PTC0–PTC2 | MII data/control signals | Full 16-signal MII bus (RX/TX clocks, data, control) - supports direct connection to IEEE 802.3-compliant PHYs (e.g., DP83848) |
| PTF0–PTF7, PTH0–PTH7, PTJ0–PTJ5 | Mini-FlexBus address/data/control | FB_AD[19:0], FB_D[7:0], FB_CS0/CS1, FB_OE, FB_RW - enables 8-/16-bit memory mapping and peripheral interfacing without glue logic |
| PTD6/BKGD/MS | Background Debug Module | Single-wire BDM interface compatible with S08/9S12x debug tools - allows in-circuit flash programming and real-time trace debugging |
| VDDA/VSSA, VREFH/VREFL | Analog power/reference | Dedicated analog supply and reference pins isolate ADC noise; VREFH = VDDAD, VREFL = VSSAD ensures ratiometric accuracy |
Key Features
| Feature | Design Value |
|---|---|
| FEC with DMA engine | Offloads Ethernet packet processing from CPU; supports scatter-gather descriptors and interrupt-on-DMA-complete for zero-copy receive/transmit |
| Mini-FlexBus configurability | Per-chip-select access timing, burst/burst-inhibited transfers, and direction control - adapts to diverse memory/peripheral timing requirements |
| Rapid GPIO (RGPIO) | 16 pins with atomic set/clear/toggle registers accessible via CPU local bus - enables cycle-accurate bit-banging for protocols like 1-Wire or custom timing signals |
| Stop3 mode with RTC/ADC | Retains real-time clock and 12-bit ADC operation during ultra-low-power state - allows periodic sensor sampling without full wake-up overhead |
| Multi-source clock generation | MCG supports FLL (internal 31.25 kHz–25 MHz reference) or PLL (external crystal) - provides flexible, low-jitter clock trees for mixed-signal subsystems |
| Security circuitry | Flash block protection and unauthorized access prevention for peripherals/RAM - enforces firmware IP protection and system integrity |
Applications
| Industrial Ethernet Gateway | Smart Energy Metering Hub |
|---|---|
|
Use Scenario: Aggregating Modbus RTU/ASCII field devices over RS-485 and bridging to TCP/IP networks via 100BASE-TX. IC Role / Device Role / Timing Role: Primary protocol gateway MCU with FEC handling Ethernet framing, Mini-FlexBus interfacing to isolated RS-485 transceivers, and RTC enabling time-stamped meter logs. Use Value: Integrated FEC + MII eliminates external MAC/PHY ICs; 24 KB RAM buffers multiple concurrent TCP sessions; stop3 mode extends battery life in backup-powered deployments. |
Use Scenario: Residential smart meter collecting voltage/current/energy data via 12-bit ADC and transmitting via Ethernet to utility AMI infrastructure. IC Role / Device Role / Timing Role: Sensor fusion controller with simultaneous ADC sampling, cryptographic signing (using Flash-resident keys), and FEC-driven packet transmission. Use Value: On-chip 128 KB Flash stores firmware + encryption keys; ADC operates in stop3 mode for low-power periodic sampling; RTC maintains accurate billing timestamps across power cycles. |
| Building Automation Controller | Networked PLC I/O Module |
|
Use Scenario: HVAC zone controller receiving BACnet MS/TP over RS-485 and exposing BACnet/IP services on enterprise LAN. IC Role / Device Role / Timing Role: Real-time protocol stack executor with dual SCI ports (MS/TP + console), FEC for BACnet/IP, and TPM for fan speed PWM control. Use Value: 3× SCI + 2× SPI + 2× I²C enables multi-interface coexistence; RGPIO toggles provide precise PWM timing for variable-speed drives; low-power wait mode sustains network presence with minimal energy draw. |
Use Scenario: DIN-rail mounted remote I/O node converting digital/analog field signals to EtherNet/IP packets for central PLC coordination. IC Role / Device Role / Timing Role: Deterministic I/O processor with Mini-FlexBus connecting to FPGA-based signal conditioning, FEC managing CIP message exchange, and KBI for emergency stop inputs. Use Value: Glueless FlexBus interface reduces FPGA pin count and layout complexity; KBI supports fast edge-triggered interrupt response (<100 ns); FEC DMA ensures jitter-free I/O update cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Kinetis K60DN512ZVLQ10 | ARM Cortex-M4 core, 100 MHz, 512 KB Flash, 128 KB RAM, Ethernet MAC (no PHY), no Mini-FlexBus | Requires external PHY and external memory for large buffers; higher performance but larger footprint and power | Choose for higher compute throughput and CMSIS ecosystem; avoid if glueless memory expansion or ColdFire toolchain continuity is required |
| MCF52259CAG80 | ColdFire V2 core, 80 MHz, 512 KB Flash, 64 KB RAM, FEC + MII, no Mini-FlexBus, different pinout | Larger package (144-LQFP), no external bus interface; targets higher-end networking with more memory | Choose for upward-compatible ColdFire migration path with greater memory headroom; avoid if 48-QFN size or FlexBus is mandatory |
Compared with K60DN512ZVLQ10 and MCF52259CAG80, the MCF51CN128CLH uniquely combines ColdFire V1 compatibility, 48-pin QFN compactness, integrated Mini-FlexBus for memory/peripheral expansion, and FEC+MII in a single low-power package - making it optimal for cost- and space-constrained industrial gateways requiring legacy toolchain support.
Availability
MCF51CN128CLH is available at Aetrix Electronics and suitable for industrial ethernet gateways, smart energy metering hubs, and building automation controllers requiring stable component supply, long-term lifecycle assurance, and qualified sourcing for production ramp.
Supply support for MCF51CN128CLH 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 acquired Freescale in 2015 and maintains full support for the ColdFire portfolio, delivering automotive-grade reliability, industrial temperature range validation, and long-term product longevity commitments.
The MCF51CN128CLH belongs to the ColdFire V1 microcontroller family, engineered specifically for deterministic real-time control in resource-constrained industrial networking applications - emphasizing integrated Ethernet, low-power operation, and flexible peripheral interfacing without external glue logic.
FAQ
What is the maximum operating frequency of the MCF51CN128CLH and under what voltage conditions?
The MCF51CN128CLH operates up to 50.33 MHz when supplied at 3.6–3.0 V, up to 40 MHz at 3.0–2.1 V, and up to 20 MHz at 2.1–1.8 V across –40 °C to +85 °C ambient. These graded frequency limits ensure stable timing margins and meet DC characteristics specified in Freescale Document MCF51CN128 Rev. 4, Section 3.6.
Does the MCF51CN128CLH support external memory expansion, and if so, how is it implemented?
Yes, the MCF51CN128CLH implements Mini-FlexBus - a configurable external bus supporting up to 1 MB of asynchronous memory or peripherals. It provides FB_AD[19:0], FB_D[7:0], FB_CS0/CS1, FB_OE, and FB_RW signals directly on dedicated pins (e.g., PTF0–PTF7, PTH0–PTH7), enabling glueless connection to SRAM, NOR flash, or FPGA logic without address latches or wait-state generators.
Can the MCF51CN128CLH's ADC operate in low-power modes, and what is its minimum supply voltage for functionality?
Yes, the 12-bit ADC remains fully operational in stop3 mode and functions across the full 3.6–1.8 V supply range. At 1.8 V, it maintains 2.5 μs conversion time and supports automatic compare, internal bandgap reference, and temperature sensing - verified in Freescale MCF51CN128 Rev. 4, Section 3.12.4 and Table 20.
What debug interface does the MCF51CN128CLH use, and is it compatible with standard tools?
The MCF51CN128CLH uses a single-wire Background Debug Module (BDM) interface on PTD6/BKGD/MS, electrically identical to that used by S08, 9S12, and 9S12X families. It is fully supported by P&E Micro's Cyclone Pro, Segger J-Link (with BDM firmware), and Freescale Codewarrior IDE - enabling flash programming, breakpoint debugging, and 64-entry trace buffer analysis.
Is the MCF51CN128CLH pin-compatible with other members of the MCF51CN128 series, such as the 64-pin or 80-pin variants?
No, the MCF51CN128CLH (48-pin QFN) is not pin-compatible with the 64-pin or 80-pin LQFP variants. Pin assignments differ significantly - e.g., Mini-FlexBus signals (FB_A19/FB_AD19) appear on PTF0 in the 48-pin package but on PTF0–PTF3 in the 80-pin version, and MII signals are redistributed across fewer pins. Refer to Freescale MCF51CN128 Rev. 4, Figures 2–4 for exact mappings.
MCF51CN128CLH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 64-LQFP
- Series:
- MCF51CN
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- Coldfire V1
- Core Size:
- 32-Bit Single-Core
- Speed:
- 50MHz
- Connectivity:
- Ethernet, I2C, SCI, SPI
- Peripherals:
- LVD, PWM, WDT
- Number of I/O:
- 54
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 24K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- A/D 12x12b
- Oscillator Type:
- External
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MCF51CN128CLH FAQ
1.How can I place an order for MCF51CN128CLH through Aetrix?
Please submit a Request for Quotation (RFQ) for MCF51CN128CLH 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 MCF51CN128CLH reliable?
The price and inventory of MCF51CN128CLH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCF51CN128CLH is usually 5 days.
3.What payment methods are accepted for MCF51CN128CLH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCF51CN128CLH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCF51CN128CLH?
MCF51CN128CLH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCF51CN128CLH 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 MCF51CN128CLH?
For technical support, including MCF51CN128CLH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCF51CN128CLH requirements.
6.How does Aetrix verify that MCF51CN128CLH is sourced from the original manufacturer or authorized distributors?
All MCF51CN128CLH 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 MCF51CN128CLH meets industry standards.
7.What is the process for return or replacement of MCF51CN128CLH?
All MCF51CN128CLH units undergo pre-shipment inspection (PSI). If there is an issue with MCF51CN128CLH, 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 MCF51CN128CLH part is unused and in its original packaging.
Return procedure for MCF51CN128CLH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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