Design Win

Small Engine EFI (Electronic Fuel Injection) Reference Design for SPC572L MCU and L9177A Driver

Download databrief

Product overview


The SPC5-L9177A-K02 provides a reference design to evaluate a complete solution to control one or two-cylinders internal combustion engine for Small Engine Application (e.g. small motorcycle, portable generator, agriculture, nautical engines).

The solution enables to drive all the relevant loads used in one/two cylinders small engine applications (such as injectors, relay, stepper motor, tachometer), to interface with Variable Reluctance Sensors, in order to monitor diagnostic functionalities and interact with the main networks present in powertrain environment (K-Line).

This reference design is matching the most relevant emission control norms such as EURO4, EURO5, Bharat Stage VI, China V and China VI.

The board is provided with an automotive 48-pole connector and all channels are protected against short circuit and over-temperature condition.

Free ready-to-run reference design examples are available inside SPC5Studio (www.st.com/spc5studio) to support quick evaluation and development for basic mono-cylinder engine.

SPC5Studio includes a “visual configuration code generation engine”, board support package (BSP), start-up routines, interrupt services and a full set of low-level drivers.

SPC5Studio is available for free download.

  • All features

    • SPC572L64F2 32-bit Power Architecture MCU for Automotive Powertrain Applications with high performance programmable timer GTM v101
    • L9177A Automotive peripheral on chip for Small Engine control
    • Small Engine Application SW: Basic fuel injection control for mono cylinder engine 4-stroke 250cc displacement with one injector and inductive coil 18-1 toothed wheel with air temperature, water temperature, barometric pressure compensation and basic calibration integrated
    • JTAG Port
    • 2 injectors / 2 coils drivers
    • 3 relay outputs
    • O2 Sensor Heater driver
    • 1 High Side output
    • Tachometer output signal
    • Variable Reluctance Sensor conditioning circuit
    • MIL output
    • +5V ref for external sensors
    • Stepper motor driver
    • Inputs for HEGO, IAT, ECT, IPS and TPS sensors
    • CAN and K-Line interface
    • KEY switch function for power-off control
    • 4 reserved digital inputs
    • 4 reserved analog inputs
    • STWD100 watchdog timer
    • 3 general purpose LEDs
    • 16 MHz crystal
    • Board size 100 x 70 mm

You might also like...

Quality and Reliability

Part Number Marketing Status RoHS Compliance Grade Material Declaration**




Material Declaration**:

Marketing Status


RoHS Compliance Grade


(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

Sample & Buy

Swipe or click the button to explore more details Don't show this again
Part Number
Marketing Status
Budgetary Price (US$)*/Qty
Order from ST
Order from distributors
Packing Type
Country of Origin
Specific features
WEEE Compliant
Core Product
Available at distributors

Distributor availability of SPC5-L9177A-K02

Distributor Name
Region Stock Min. Order Third party link

Distributor reported inventory date:

No availability of distributors reported, please contact our sales office

SPC5-L9177A-K02 Active

Budgetary Price (US$)*/Qty:
Packing Type:
Country of Origin:

Part Number:




Specific features:


WEEE Compliant:


Core Product:


Swipe or click the button to explore more details Don't show this again

(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors