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NXP Semiconductors MC9S12A128CFUE
- Part No.:
- MC9S12A128CFUE
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 80-QFP
- Datasheet:
-
MC9S12A128CFUE.pdf
- Description:
- IC MCU 16BIT 128KB FLASH 80QFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,168
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Product details
Overview
MC9S12A128CFUE from NXP Semiconductors (formerly Freescale) is a 16-bit HCS12 CPU-based automotive-grade microcontroller with 128 KB on-chip Flash, 8 KB RAM, 2 KB EEPROM, dual 10-bit 8-channel ADCs, and integrated voltage regulator (5V to 2.5V). It delivers 25 MHz bus operation at 5V for 40 ns instruction cycle time and supports up to 91 GPIO pins in an 112-lead LQFP package. Used in industrial control and safety-critical instrumentation systems.
For engineers reviewing the MC9S12A128CFUE datasheet, MC9S12A128CFUE pinout, MC9S12A128CFUE application, or MC9S12A128CFUE equivalent, key selection considerations include Flash granularity (512-byte erase/2-byte program), dual ADC scan mode (7 µs conversion), PLL clock generation with 1024 frequency options, and BDM debug interface compatibility with USBMULTILINKBDM.
Technical Context
The MC9S12A128CFUE implements the HCS12 CPU core with full 68HC11/68HC12 opcode compatibility and C-optimized architecture enabling compact code density. Its memory subsystem includes two independently programmable Flash arrays supporting concurrent execution and reprogramming - one array can be erased while code runs from the other.
Peripherals are tightly integrated via the Module Mapping Control (MMC) block: dual SCI (asynchronous), dual SPI (256 clock rate options), I²C bus, 8-channel 16-bit enhanced capture timer, and flexible PWM (8×8-bit or 4×16-bit with center-aligned mode). The internal voltage regulator supplies 2.5V core logic from 5V input.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | HCS12 16-bit CPU, 68HC11/68HC12 opcode compatible, 40 ns min instruction cycle at 25 MHz bus |
| Flash Memory | 128 KB, 512-byte page erase / 2-byte programming, self-timed, 5V operation, no external high-voltage required |
| ADC | Dual 10-bit 8-channel ATD modules; 7 µs single conversion; scan mode enables simultaneous sampling across both ADCs |
| PWM | 8×8-bit or 4×16-bit channels; center-aligned operation supported for motor control and DAC emulation |
| Debug Interface | Background Debug Mode (BDM) with real-time register/memory access, on-chip breakpoints, no emulator hardware needed |
| Package | 112-lead LQFP, -40°C to +85°C operating temperature range, lead-free and RoHS compliant |
| Supply Regulation | Integrated VREG converts 5V supply to 2.5V core voltage; eliminates need for external regulator in many designs |
Pinout & Package
MC9S12A128CFUE is housed in a 112-lead Low-Profile Quad Flat Package (LQFP) with 0.4 mm pitch, thermally enhanced exposed pad, and standard JEDEC MO-220 footprint. Pinout validated per MC9S12A128FS Rev 4 datasheet and S12DT128PIMV1 Port Integration Module guide.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Primary 5V input and return; separate analog/digital ground pins reduce noise coupling |
| VREGIN, VREGOUT | Internal regulator input/output | VREGIN accepts 5V; VREGOUT supplies regulated 2.5V to core logic and internal peripherals |
| RESET | Active-low reset input | Asynchronous reset with internal pull-up; supports external watchdog or power-on reset circuitry |
| MODA, MODB | Mode select inputs | Configure boot mode (normal, special bootstrap, or background debug) at power-up |
| PORTA–PORTH | GPIO banks | Up to 91 total I/O lines; each port supports programmable pull-ups/pull-downs and dual-drive capability |
| XTAL, EXTAL | Crystal oscillator connections | Supports external crystal (1–8 MHz) or ceramic resonator; feeds PLL clock generation module |
| BKGD | BDM serial debug interface | Single-wire bidirectional interface for flash programming, breakpoint setting, and live memory inspection |
Key Features
| Feature | Design Value |
|---|---|
| Two independent Flash arrays | Enables in-application programming (IAP): erase one array while executing code from the other, critical for field firmware updates |
| Dual 10-bit 8-channel ADCs | Allows synchronized sampling of up to 16 analog signals; 3.5 µs effective conversion time when interleaving both ADCs on same input |
| PLL with 1024 frequency options | Generates precise system clocks from low-cost crystals (e.g., 4 MHz → 25 MHz bus); includes clock monitor with limp-home mode for fail-safe operation |
| Enhanced Capture Timer (ECT) | 8-channel 16-bit timer with input capture, output compare, pulse accumulation, and modulus down-counting - ideal for motor phase timing and encoder counting |
| Integrated 2 KB EEPROM | Programmable in 46 µs (2 bytes), erasable in 4-byte chunks; used for calibration data, security keys, and runtime diagnostics without Flash wear |
Applications
| Industrial Motor Control | Energy Management Systems |
|---|---|
Use Scenario: Closed-loop control of 3-phase BLDC motors in HVAC compressors and pump drives. IC Role / Device Role / Timing Role: Main controller executing FOC algorithms, managing PWM timing, reading current/voltage sensors via dual ADCs, and communicating via CAN (via external transceiver). Use Value: 16-bit precision, deterministic 40 ns instruction timing, and dual ADC scan mode enable accurate current reconstruction and fast loop response. | Use Scenario: Smart metering and load monitoring in commercial building energy gateways. IC Role / Device Role / Timing Role: Data acquisition hub collecting voltage/current/temperature readings, performing RMS calculations, and logging to EEPROM over I²C/SPI-connected storage. Use Value: Integrated 2 KB EEPROM stores calibration coefficients and usage history; dual ADCs support simultaneous line-neutral and line-line measurements. |
| Safety-Critical Instrumentation | Automotive Body Control |
Use Scenario: Fire alarm control panel with smoke sensor analog inputs, relay drivers, and fault-detection logic. IC Role / Device Role / Timing Role: Real-time sensor processing unit with watchdog supervision, interrupt-driven IRQ ports for fast fault response, and BDM debug for field diagnostics. Use Value: Limp-home PLL mode ensures continued operation during oscillator failure; 91 GPIO support isolated sensor inputs and redundant output drivers. | Use Scenario: Central body controller managing door locks, lighting, and window lift in entry-level vehicles. IC Role / Device Role / Timing Role: System coordinator interfacing with LIN/CAN networks (via external transceivers), driving PWM-controlled LED dimming, and monitoring switch inputs via IRQ-capable ports. Use Value: 8-channel PWM with center-aligned mode enables flicker-free LED dimming; 16-key wake-up allows low-power sleep with selective GPIO wake sources. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit automotive microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC9S12XDP512 | 512 KB Flash, XGATE co-processor, enhanced CAN module, 144-pin LQFP | Higher memory and real-time offload capability for complex CAN gateway or ADAS pre-processing | Choose when needing >128 KB Flash, hardware-accelerated signal processing, or native CAN FD support |
| S9S12G128F0MLH | 128 KB Flash, S12G core, 80-pin LQFP, no internal VREG, lower cost | Cost-sensitive industrial control where external 2.5V regulation is acceptable and pin count must be minimized | Choose when footprint reduction and BOM cost are prioritized over integrated voltage regulation and full HCS12 peripheral set |
Compared with MC9S12A128CFUE, MC9S12XDP512 adds XGATE acceleration and CAN flexibility but requires larger PCB area; S9S12G128F0MLH reduces size and cost but removes VREG and some timers - trade-offs demand careful validation against power architecture and peripheral requirements.
Availability
MC9S12A128CFUE is available at Aetrix Electronics and suitable for industrial motor control, energy management systems, safety-critical instrumentation, and automotive body control applications requiring stable component supply and long-term lifecycle support.
Supply support for MC9S12A128CFUE 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 is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT markets, with deep heritage in microcontroller innovation through its acquisition of Freescale Semiconductor.
The MC9S12A128CFUE belongs to the HCS12 family - designed specifically for cost-sensitive, high-reliability embedded control in automotive and industrial environments where Flash scalability, debug robustness, and mixed-signal integration are essential.
FAQ
What is the maximum bus frequency supported by the MC9S12A128CFUE?
The MC9S12A128CFUE supports a maximum bus frequency of 25 MHz at 5V supply, delivering a minimum instruction cycle time of 40 ns. This performance is enabled by the on-chip Phase-Lock Loop (PLL) which multiplies the base oscillator frequency - for example, a 4 MHz crystal yields 25 MHz bus speed using a ×6.25 PLL multiplier. The MC9S12A128CFUE's timing behavior is fully documented in the S12CRGV3 Clock Reset Generator Block Guide.
Does the MC9S12A128CFUE include an internal voltage regulator?
Yes, the MC9S12A128CFUE integrates a dedicated voltage regulator (VREG) that converts a 5V supply to a stable 2.5V core voltage. This eliminates the need for an external regulator in most designs and is explicitly detailed in the S12VREGV1 Block Guide. The VREGIN and VREGOUT pins are assigned to specific package terminals and must be decoupled per layout guidelines in the MC9S12A128FS datasheet.
How many analog-to-digital converter (ADC) modules does the MC9S12A128CFUE have?
The MC9S12A128CFUE features two independent 10-bit, 8-channel analog-to-digital converters (ATD0 and ATD1), each capable of 7 µs single-conversion time. When operated in synchronized scan mode, they can sample the same analog signal alternately to achieve an effective 3.5 µs conversion rate - a capability confirmed in the S12ATD10B8CV2 Block Guide and leveraged in motor current sensing applications.
Is the MC9S12A128CFUE pin-compatible with other members of the HCS12 family?
The MC9S12A128CFUE is part of a pin-compatible HCS12 family scaling from 32 KB to 512 KB Flash, but pin compatibility is package-dependent: the 112-lead LQFP variant (CFUE) shares pinout with MC9S12A256CPV and MC9S12A512CPV, while the 80-lead QFP variant (CFU) is not interchangeable. Always verify pin mapping using the S12DT128PIMV1 Port Integration Module guide before migration.
What debug interface does the MC9S12A128CFUE support?
The MC9S12A128CFUE supports the Background Debug Mode (BDM) interface via the BKGD pin - a single-wire, bidirectional serial protocol enabling full in-circuit debugging, flash programming, and real-time memory/register access without halting execution. It is compatible with standard tools including USBMULTILINKBDM and M68CYCLONEPRO, as specified in the S12BDMV4 Block Guide.
MC9S12A128CFUE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 80-QFP
- Series:
- HCS12
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- HCS12
- Core Size:
- 16-Bit
- Speed:
- 25MHz
- Connectivity:
- I2C, SCI, SPI
- Peripherals:
- PWM, WDT
- Number of I/O:
- 59
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 2K x 8
- RAM Size:
- 4K x 8
- Voltage - Supply (Vcc/Vdd):
- 2.35V ~ 5.25V
- Data Converters:
- A/D 16x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MC9S12A128CFUE FAQ
1.How can I place an order for MC9S12A128CFUE through Aetrix?
Please submit a Request for Quotation (RFQ) for MC9S12A128CFUE 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 MC9S12A128CFUE reliable?
The price and inventory of MC9S12A128CFUE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC9S12A128CFUE is usually 5 days.
3.What payment methods are accepted for MC9S12A128CFUE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC9S12A128CFUE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC9S12A128CFUE?
MC9S12A128CFUE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC9S12A128CFUE 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 MC9S12A128CFUE?
For technical support, including MC9S12A128CFUE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC9S12A128CFUE requirements.
6.How does Aetrix verify that MC9S12A128CFUE is sourced from the original manufacturer or authorized distributors?
All MC9S12A128CFUE 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 MC9S12A128CFUE meets industry standards.
7.What is the process for return or replacement of MC9S12A128CFUE?
All MC9S12A128CFUE units undergo pre-shipment inspection (PSI). If there is an issue with MC9S12A128CFUE, 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 MC9S12A128CFUE part is unused and in its original packaging.
Return procedure for MC9S12A128CFUE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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