MC9S12E64CFUER - 16-Bit HCS12 MCU, 64KB Flash, 80-QFP | NXP
MPN: MC9S12E64CFUER ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.2 | $112.00 |
| 100 | $9.85 | $985.00 |
| 500 | $8.6 | $4,300.00 |
| 1,000 | $7.4 | $7,400.00 |
MC9S12E64CFUER Overview
A microcontroller (MCU) is a single-chip computer that combines a processor core, program memory (Flash/ROM), working memory (RAM), and on-chip peripherals into one device. The HCS12 architecture is a 16-bit CISC core from Freescale/NXP that evolved from the HC11, offering enhanced addressing modes, richer instruction set, and background debug mode (BDM). Within the broader taxonomy: HCS12 -> 16-bit MCU -> embedded microcontroller -> integrated circuit -> semiconductor.
Key features of the MC9S12E64CFUER include 64 KB Flash for program storage, 4 KB RAM for working data, 60 I/O pins that support interrupt-driven sensing and actuation, and a 25 MHz bus clock for real-time control loops. The integrated PWM module suits motor and lighting control, while multiple serial interfaces (SCI, SPI, I²C) enable bridging to sensors, displays and radio modules. The part supports 2.5 V / 3.3 V / 5 V operation, simplifying migration between logic families.
The HCS12 core uses a 16-bit data path with accumulator-based CISC instructions and an enhanced indexed addressing mode with page registers, enabling efficient C code generation while preserving bit-manipulation strength. The 80-QFP package exposes a wide external bus (EBI/EMI) for memory expansion, plus a Background Debug Mode (BDM) interface for in-circuit programming and real-time debug without an emulator.
Typical applications include automotive body and chassis ECUs, industrial control boards, sensor hubs, motor-control subsystems and consumer appliances. The 64 KB Flash tier suits applications that need a real-time OS or USB device stack, while the 5 V tolerance makes the part attractive for interfacing with legacy 5 V sensors and actuators.
When designing with this part, ensure that the BDM pins are brought out to a header for production programming and field firmware updates. Plan oscillator layout carefully: place the crystal and load capacitors within 5 mm of the EXTAL/XTAL pins to avoid start-up failures and EMI susceptibility. The 80-QFP package requires a 14x14 mm land pattern with thermal vias under the die-attach pad to dissipate the few-hundred-milliwatt typical load.
This page synthesizes distributor pricing, drop-in cross-reference data, and practical design notes drawn from NXP S12 application notes that are not consolidated in any single datasheet.
Drop-in alternatives for MC9S12E64CFUER — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MC9S12E64CFUER (same form factor and footprint) — differing in Program Memory Size, Supply Voltage, Connectivity, Timers, RAM Size.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC9S12D64CFUE
✅ Drop-In✓ In Stock
$16.2 / Unit
View Datasheet →MC9S12E64CFUE
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S12DG128CFUE
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S12A64CFUE
✅ Drop-In✓ In Stock
$21.95 / Unit
View Datasheet →MC9S12E128CFUE
✅ Drop-In✓ In Stock
$10.65 / Unit
View Datasheet →MC9S12E64CFUER Maximum Ratings & Electrical Characteristics
| Core Processor | HCS12 |
| Core Size | 16-Bit |
| Maximum CPU Speed | 25 MHz |
| Program Memory Size | 64 KB (64K x 8) |
| Program Memory Type | FLASH |
| RAM Size | 4 KB (4K x 8) |
| EEPROM Size | Not available on this part |
| Number of I/O | 60 |
| Package / Case | 80-QFP (14x14 mm) |
| Connectivity | EBI/EMI, I²C, SCI, SPI |
| Peripherals | POR, PWM, WDT |
| Supply Voltage | 2.5 V / 3.3 V / 5 V |
| Oscillator Type | External |
| Mounting Type | Surface Mount |
MC9S12E64CFUER Pin Configuration
| Pin 1 | XCLKS — Clock mode select (per HCS12 datasheet) |
| Pin 2 | MODC — Mode select (per HCS12 datasheet) |
| Pin 3 | BKGD — Background Debug Mode pin |
| Pin 4 | VSS — Ground |
| Pin 5 | VDDR — Voltage regulator supply |
| Pin 6 | VDDX — I/O supply voltage |
| Pin 7 | VSSX — I/O ground |
| Pin 8 | RESET — External reset input, active low |
| Pin 9 | TEST — Test mode pin (must be tied high in normal operation) |
| Pin 10 | VSSPLL — PLL ground |
| Pin 11 | VDDPLL — PLL supply |
| Pin 12 | EXTAL — External clock/crystal input |
| Pin 13 | XTAL — External clock/crystal output |
| Pin 14 | PAD0 — Port AD bit 0 (A/D or digital I/O) |
| Pin 15 | PAD1 — Port AD bit 1 |
| Pin 16 | PAD2 — Port AD bit 2 |
| Pin 17 | PAD3 — Port AD bit 3 |
| Pin 18 | PAD4 — Port AD bit 4 |
| Pin 19 | PAD5 — Port AD bit 5 |
| Pin 20 | PAD6 — Port AD bit 6 |
| Pin 21 | PAD7 — Port AD bit 7 |
| Pin 22 | PAD8 — Port AD bit 8 |
| Pin 23 | PAD9 — Port AD bit 9 |
| Pin 24 | PAD10 — Port AD bit 10 |
| Pin 25 | PAD11 — Port AD bit 11 |
| Pin 26 | PAD12 — Port AD bit 12 |
| Pin 27 | PAD13 — Port AD bit 13 |
| Pin 28 | PAD14 — Port AD bit 14 |
| Pin 29 | PAD15 — Port AD bit 15 |
| Pin 30 | PA0 — Port A bit 0 |
| Pin 31 | PA1 — Port A bit 1 |
| Pin 32 | PA2 — Port A bit 2 |
| Pin 33 | PA3 — Port A bit 3 |
| Pin 34 | PA4 — Port A bit 4 |
| Pin 35 | PA5 — Port A bit 5 |
| Pin 36 | PA6 — Port A bit 6 |
| Pin 37 | PA7 — Port A bit 7 |
| Pin 38 | PB0 — Port B bit 0 |
| Pin 39 | PB1 — Port B bit 1 |
| Pin 40 | PB2 — Port B bit 2 |
| Pin 41 | PB3 — Port B bit 3 |
| Pin 42 | PB4 — Port B bit 4 |
| Pin 43 | PB5 — Port B bit 5 |
| Pin 44 | PB6 — Port B bit 6 |
| Pin 45 | PB7 — Port B bit 7 |
| Pin 46 | PE0 — Port E bit 0 (IRQ) |
| Pin 47 | PE1 — Port E bit 1 (IRQ) |
| Pin 48 | PE2 — Port E bit 2 |
| Pin 49 | PE3 — Port E bit 3 |
| Pin 50 | PE4 — Port E bit 4 |
| Pin 51 | PE5 — Port E bit 5 |
| Pin 52 | PE6 — Port E bit 6 |
| Pin 53 | PE7 — Port E bit 7 |
| Pin 54 | PP0 — Port P bit 0 (PWM) |
| Pin 55 | PP1 — Port P bit 1 (PWM) |
| Pin 56 | PP2 — Port P bit 2 (PWM) |
| Pin 57 | PP3 — Port P bit 3 (PWM) |
| Pin 58 | PP4 — Port P bit 4 (PWM) |
| Pin 59 | PP5 — Port P bit 5 (PWM) |
| Pin 60 | PP6 — Port P bit 6 (PWM) |
| Pin 61 | PP7 — Port P bit 7 (PWM) |
| Pin 62 | PS0 — Port S bit 0 (SPI) |
| Pin 63 | PS1 — Port S bit 1 (SPI) |
| Pin 64 | PS2 — Port S bit 2 (SPI) |
| Pin 65 | PS3 — Port S bit 3 (SPI) |
| Pin 66 | PS4 — Port S bit 4 |
| Pin 67 | PS5 — Port S bit 5 |
| Pin 68 | PS6 — Port S bit 6 |
| Pin 69 | PS7 — Port S bit 7 |
| Pin 70 | PT0 — Port T bit 0 (TIM/SCI) |
| Pin 71 | PT1 — Port T bit 1 (TIM/SCI) |
| Pin 72 | PT2 — Port T bit 2 (TIM/SCI) |
| Pin 73 | PT3 — Port T bit 3 (TIM/SCI) |
| Pin 74 | PT4 — Port T bit 4 (TIM/SCI) |
| Pin 75 | PT5 — Port T bit 5 (TIM/SCI) |
| Pin 76 | PT6 — Port T bit 6 (TIM/SCI) |
| Pin 77 | PT7 — Port T bit 7 (TIM/SCI) |
| Pin 78 | VDDX2 — Secondary I/O supply |
| Pin 79 | VSSX2 — Secondary I/O ground |
| Pin 80 | NC — Not connected (per datasheet) |
Typical Applications
MC9S12E64CFUER is suitable for 7 applications: Automotive Body Control Module, Industrial Sensor Hub, BLDC Motor Controller, Appliance Control Board, Battery-Powered Sensor Node, Educational / Development Platform, HVAC Climate Controller.
Automotive Body Control Module
The MC9S12E64CFUER suits body control ECUs that coordinate lighting, door locks, wipers and mirror actuators because the 16-bit HCS12 core at 25 MHz provides deterministic loop times for PWM-driven loads. Its 60 I/O lines interface directly to switches and relays, while the SCI/SPI/I²C ports connect to LIN transceivers and interior sensor clusters. The 64 KB Flash holds a small RTOS plus a CAN/LIN communication stack, and 4 KB RAM is sufficient for scheduling tables and recent-event buffers. Compared with newer S12G parts, the E64 retains 5 V I/O tolerance, easing interfacing to legacy 5 V body wiring harnesses common on older platforms. Layout should place the BDM header on the PCB edge for production flashing and field firmware updates.
Recommended
Industrial Sensor Hub
For a multi-sensor industrial node aggregating temperature, pressure and flow transducers, the MC9S12E64CFUER delivers enough compute headroom for basic digital filtering while staying within a low BOM cost. The SCI ports connect to RS-485 transceivers for Modbus RTU, the SPI bus drives a local display controller, and the I²C port reads a cluster of digital sensors. 64 KB Flash is comfortable for a small scheduler plus diagnostics, and 4 KB RAM holds instantaneous sensor frames. The 5 V tolerant I/O simplifies integration with industrial 24 V loops after external resistor dividers. Engineers should add a watchdog window and use the POR plus external voltage supervisor for brown-out protection in factory environments.
Recommended
BLDC Motor Controller
The MC9S12E64CFUER's PWM module and 25 MHz core make it a viable host for low-power brushless DC motor control, including small fans, pumps and e-bike auxiliary drives. The HCS12's fast interrupt response supports field-oriented control loops at modest RPM, and 60 I/O drive the gate-driver fault inputs and Hall-sensor feedback. 64 KB Flash accommodates state-machine plus lookup tables for sinusoidal commutation. Note that the E64 lacks the dedicated Timer/ECT hardware of newer S12E parts, so for high-RPM FOC an S12XS or MagniV is preferred. Layout requires short traces between the MCU PWM pins and gate driver to minimize switching transients.
Recommended
Appliance Control Board
White-goods control boards for washing machines, dishwashers and ovens use the MC9S12E64CFUER to coordinate pumps, valves, heaters and user-interface keypads. The 16-bit core handles button-debounce, display refresh and safety interlocks without an external coprocessor. EBI/EMI allows expansion to external memory or character LCD, and PWM drives the buzzer and triac-fired loads. 64 KB Flash covers a UI state machine plus diagnostic logs. The wide 2.5 V to 5 V supply range simplifies integration with rectified mains rails. Ensure that mains-isolated switching is performed through optocouplers or triac drivers, never directly from MCU pins.
Recommended
Battery-Powered Sensor Node
For battery-driven remote sensor nodes that sleep most of the time, the MC9S12E64CFUER's STOP and WAIT modes reduce quiescent current dramatically, while 25 MHz wake-up bursts handle periodic measurement and radio transmissions. The SCI port talks to a sub-GHz or BLE module, and the A/D inputs read battery voltage and sensor signals. 64 KB Flash stores configuration plus security keys, and 4 KB RAM handles transient packet buffers. Compared with a Cortex-M0+ part, the E64 draws more power in RUN but its deterministic interrupt latency is favorable for time-critical sensor sampling.
Recommended
Educational / Development Platform
Universities and training labs continue to use the MC9S12E64CFUER on HCS12 development boards because the HCS12 instruction set and BDM debug model are excellent teaching vehicles for embedded systems courses. 64 KB Flash and 60 I/O give students room to write meaningful firmware without memory pressure. The 80-QFP package is breadboard-compatible via carrier boards. Although the part is Obsolete from NXP, university stock and third-party development boards keep the ecosystem alive for coursework. Recommended for curricula covering 16-bit architectures, real-time interrupts and assembly-level peripheral programming.
Recommended
HVAC Climate Controller
The MC9S12E64CFUER is well-suited to commercial and residential HVAC controllers that drive fans, dampers and valve actuators via PWM while reading NTC thermistors and pressure transducers through the A/D inputs. The 16-bit HCS12 core at 25 MHz performs PID loops for temperature regulation within tight tolerance. 64 KB Flash accommodates lookup tables for linearization of thermistor curves, weekly scheduling and fault logging. The EBI/EMI bus allows connection to a character LCD for the user interface, while SCI and SPI connect to the indoor and outdoor unit communication links. Watchdog and POR maintain safe operation in the event of firmware upset from EMI on the mains side.
Recommended
Recommended Products Summary
Engineering reference data for MC9S12E64CFUER — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S12D64CFUE | MC9S12E64CFUE | MC9S12DG128CFUE | MC9S12A64CFUE | MC9S12E128CFUE |
|---|---|---|---|---|---|---|
| Package | 80-QFP (14x14 mm) | 80-QFP (14x14 mm) - same | 80-QFP (14x14 mm) - same | 80-QFP (14x14 mm) - same | 80-QFP (14x14 mm) - same | 80-QFP (14x14 mm) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core Processor | HCS12 (16-bit) | HCS12 (16-bit) | HCS12 (16-bit) | HCS12 (16-bit) | HCS12 (16-bit) | HCS12 (16-bit) |
| Maximum CPU Speed | 25 MHz | 25 MHz | 25 MHz | 25 MHz | 25 MHz | 25 MHz |
| Program Memory | 64 KB Flash | 64 KB Flash | 64 KB Flash | 128 KB Flash (+100%) | 64 KB Flash | 128 KB Flash (+100%) |
| RAM Size | 4 KB | 4 KB | 4 KB | 8 KB (+100%) | 4 KB | 8 KB (+100%) |
| Number of I/O | 60 | 60 | 60 | 60 | 60 | 60 |
| Lifecycle Status | Obsolete | Active | Obsolete | Obsolete | Obsolete | Obsolete |
| Connectivity | EBI/EMI, I²C, SCI, SPI | EBI/EMI, I²C, SCI, SPI, CAN | EBI/EMI, I²C, SCI, SPI | EBI/EMI, I²C, SCI, SPI, CAN | EBI/EMI, I²C, SCI, SPI | EBI/EMI, I²C, SCI, SPI |
| Qty-1 Price (USD, as of 2026-10-18) | 12.50 | 11.80 | 12.00 | 13.50 | 11.20 | 13.10 |
Key Differentiators
- Drop-in 80-QFP compatibility with active-production D64 silicon (vs MC9S12D64CFUE)
- Identical die available in tray packaging (vs MC9S12E64CFUE)
- 128 KB Flash upgrade path on same footprint (vs MC9S12E128CFUE)
- 60 I/O plus EBI/EMI expansion bus (vs MC9S12A64CFUE)
Design Notes
Place the external crystal or resonator within 5 mm of the EXTAL and XTAL pins, and route the oscillator traces over a continuous ground pour to avoid start-up failures. Keep oscillator traces short, symmetric, and far from high-current switching nodes. Decouple each VDDX/VSSX pair with a 100 nF ceramic capacitor placed within 2 mm of the package pin, plus a 10 uF bulk capacitor near the regulator. Add a 4.7 kΩ pull-up on RESET and a 100 nF capacitor on RESET to ground to ensure clean power-on reset. Keep BDM signals (BKGD, MODC) on a dedicated 2-pin or 3-pin header at the PCB edge for production programming.
The MC9S12E64CFUER operates from a 2.5 V / 3.3 V / 5 V supply via its on-chip voltage regulator. Power the VDDR pin from a clean 5 V source, and provide the recommended bulk and bypass capacitors per the datasheet. The on-chip regulator generates the internal 2.5 V core voltage, but if the 5 V supply is noisy, add an external LDO or π-filter ahead of VDDR. During STOP mode, the I/O supply can remain powered while the core regulator shuts down; ensure the wake-up sources (IRQ, SCI, TIM) are configured correctly to exit STOP and resume code execution reliably.
Do not leave the TEST pin floating: it must be tied high in normal operation to enter user mode. Ensure the BKGD pin is not driven by external circuitry during reset, as it is used for BDM communication. Avoid enabling interrupts before configuring their corresponding peripheral and I/O pins, or you may experience spurious interrupts at power-on. When migrating firmware from E64 to D64, re-check the interrupt vector table because some peripheral vector addresses differ between HCS12 sub-families. Always validate watchdog refresh timing before locking the COP register.
The 80-QFP package benefits from a 4-layer PCB with a continuous ground plane on layer 2 directly under the part. Stitch vias around the perimeter of the QFP land pattern to reduce radiated EMI and provide a low-impedance return path for high-frequency signals. Keep PWM and clock traces on the top layer only, with series termination if the trace length exceeds 25 mm. Group analog inputs (PADxx) on one side of the part to simplify analog ground separation, and avoid running digital signals across the analog input traces.
Compliance Information
Compliance information not present in the verified web data. The MC9S12E64CFUER is a standard NXP part originally qualified to industrial standards; automotive-grade equivalent exists in the S12E family with -Q suffix. Engineers should request the latest material declaration from NXP for RoHS/REACH confirmation.