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NXP Semiconductors MM912KS812AMAF
- Part No.:
- MM912KS812AMAF
- Manufacturer:
- NXP Semiconductors
- Category:
- Application Specific Microcontrollers
- Package:
- 100-LQFP Exposed Pad
- Datasheet:
-
MM912KS812AMAF.pdf
- Description:
- IC MCU 16BIT HCS12 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,749
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Product details
Overview
MM912KS812AMAF from NXP Semiconductors is an engine control System-in-Package (SiP) integrating an S12XS MCU and MC33812 analog driver die for motorcycle and single-cylinder small-engine applications. It delivers 256 KB flash, 12 KB RAM, operates from 4.7 V to 36 V VPWR, features ISO-9141 K-Line transceiver, and drives injector (4.0 A), relay (4.0 A), lamp (1.5 A), and ignition outputs with fault reporting.
For engineers reviewing the MM912KS812AMAF datasheet, MM912KS812AMAF pinout, MM912KS812AMAF application, or MM912KS812AMAF equivalent, this SiP enables compact ECU designs requiring integrated microcontroller, power drivers, diagnostics, and robust automotive-grade voltage tolerance in a single 100-pin LQFP-EP package.
Technical Context
The MM912KS812AMAF combines two die in one package: the S12XS MCU core with ECC-protected flash, IPLL for EMC improvement, and 16-channel ATD converter; and the MC33812 analog driver with parallel-input-controlled low-side injector/relay/lamp outputs, high/low-side ignition drivers, and dedicated fault-sense outputs (INJFLT, RELFLT, IGNFLT). Both subsystems share coordinated reset and watchdog supervision.
Power architecture includes a VCC pre-regulator delivering +5.0 V for MCU logic, internal 3.3 V regulators for core (VDD/VSS2), PLL (VDDPLL/VSSPLL), and flash (VDDF/VSS), plus VPWR-supplied analog rails (VCCSENS/VCCREF) and isolated power grounds (DGND, PGND1, PGND2). All external outputs feature short-to-battery and overcurrent protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Flash Memory | 256 KB - Stores full engine control firmware with ECC error correction for field reliability. |
| RAM | 12 KB - Supports real-time sensor processing, PID control loops, and diagnostic data buffering. | Operating Voltage Range | 4.7 V to 36 V VPWR - Enables direct battery connection across cold-crank, run, and load-dump conditions. |
| Injector Driver Current Limit | 4.0 A typical - Directly drives high-current fuel injectors without external MOSFETs. |
| Lamp Driver Current Limit | 1.5 A typical - Powers MIL (Malfunction Indicator Lamp) with integrated current regulation. |
| ISO-9141 Interface | Integrated K-Line transceiver - Provides standardized OBD-II diagnostics without external level-shifting components. |
| Package | 100-pin LQFP-EP (98ASA00371D) - Exposed pad enhances thermal dissipation for sustained power-driver operation. |
Pinout & Package
Package: 100-pin LQFP-EP (exposed thermal pad), RoHS-compliant, Pb-free (AF suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VPWR (Pin 33) | Main supply input | Accepts 4.7–36 V battery rail; requires reverse-battery protection and transient suppression per design note. |
| INJOUT (Pin 17) | Injector driver output | Low-side switch output rated 4.0 A typical; connects directly to injector coil ground return. |
| IGNOUTH / IGNOUTL (Pins 27/26) | Ignition driver outputs | High-side and low-side outputs for driving IGBT or Darlington ignition coils; IGNSUP (Pin 28) selects supply source. |
| ROUT (Pin 9) | Relay driver output | Low-side 4.0 A typical output for fuel pump or auxiliary relays; includes open-drain fault reporting via RELFLT. |
| LAMPOUT (Pin 12) | MIL lamp driver | 1.5 A typical low-side output for dashboard warning lamp; controlled by LAMPIN (Pin 99) parallel input. |
| RESETB (Pins 64 & 93) | Reset signal interface | Pin 64: MCU reset input/output; Pin 93: Analog die's RESETB output to MCU - synchronized reset propagation. |
| INJFLT / RELFLT / IGNFLT (Pins 94–96) | Fault status outputs | Dedicated logic-level outputs reporting injector, relay, or ignition circuit faults to MCU for diagnostic logging. |
| ISO9141 (Pin 30) | K-Line bidirectional interface | VPWR-referenced open-drain IN/OUT for OBD-II communication; requires external ESD capacitor per layout guidance. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated S12XS MCU + MC33812 driver | Single-package solution eliminates inter-die routing, reduces PCB area, and ensures timing-coherent control of power stages. |
| ECC on flash memory | Hardware error correction protects firmware integrity against bit flips in harsh EMI environments. |
| IPLL frequency modulation | Reduces electromagnetic emissions during clock generation, easing EMC compliance for vehicle-level testing. |
| Parallel-input driver architecture | Direct GPIO control (INJIN, IGNIN, RIN, LAMPIN) avoids SPI/I²C overhead for time-critical actuator updates. |
| VCC pre-regulator with VCCREF/VCCSENS | On-chip +5.0 V regulator with external PNP pass transistor support enables stable MCU supply under wide VPWR variation. |
Applications
| Motorcycle Engine Control Unit | Small-Engine Generator ECU |
|---|---|
|
Use Scenario: Real-time spark timing, fuel injection, and idle speed control for air-cooled single-cylinder engines. IC Role / Device Role / Timing Role: Primary system-on-chip executing closed-loop combustion control, diagnostics, and CAN/K-Line communication. Use Value: Eliminates discrete MCU + driver IC layout complexity while maintaining ASIL-B–capable functional safety monitoring via integrated fault outputs. |
Use Scenario: Automatic voltage regulation, overload shutdown, and runtime diagnostics in portable diesel/gasoline generators. IC Role / Device Role / Timing Role: Central controller managing alternator excitation, fuel solenoid actuation, and generator protection logic. Use Value: 4.7–36 V VPWR range accommodates variable battery states; relay and lamp drivers enable direct panel indicator and contactor control. |
| Marine Outboard Ignition Module | ATV/UTV Powertrain Controller |
|
Use Scenario: High-vibration, moisture-prone marine environment requiring robust spark generation and knock detection. IC Role / Device Role / Timing Role: Ignition timing master with high/low-side IGBT drive (IGNOUTH/IGNOUTL), analog sensor interface (PAD00–PAD07), and fault feedback. Use Value: Integrated IGNFB (Pin 29) supports closed-loop ignition current sensing via 10:1 divider, enabling adaptive dwell control. |
Use Scenario: Compact, cost-sensitive off-road vehicle ECU handling throttle response, gear shift logic, and emissions compliance. IC Role / Device Role / Timing Role: Dual-role controller executing both engine management and transmission actuation via injector, relay, and PWM outputs. Use Value: 16-channel ATD converter (via PAD00–PAD07) supports simultaneous TPS, MAP, coolant, and exhaust temperature sampling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar engine control SiP applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MM912JS812AMAF | 128 KB flash, 8 KB RAM - smaller code/data footprint; identical pinout and peripheral set. | Suitable for less complex firmware (e.g., carbureted engines without O2 feedback). | Select when firmware size remains under 128 KB and diagnostic depth is reduced. |
| MC9S12XEP100 + MC33812 (discrete) | Separate MCU and driver ICs require PCB routing, additional decoupling, and timing coordination. | Offers greater flexibility in layout, thermal partitioning, and independent upgrade paths for MCU/driver. | Choose when design requires non-SiP modularity, extended temperature validation, or legacy toolchain compatibility. |
Compared with MM912JS812AMAF, the MM912KS812AMAF provides 128 KB more flash and 4 KB more RAM for advanced diagnostics and calibration storage; compared with discrete MC9S12XEP100+MC33812, it reduces BOM count and board space but constrains independent die-level qualification.
Availability
MM912KS812AMAF is available at Aetrix Electronics and suitable for motorcycle ECUs, small-engine generator controls, and off-road vehicle powertrain systems requiring stable component supply, long-lifecycle support, and automotive-grade reliability.
Supply support for MM912KS812AMAF 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 specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in microcontrollers and power analog integration.
The MM912KS812AMAF belongs to NXP's SMARTMOS SiP product line, designed specifically for cost-optimized, space-constrained engine control units in single-cylinder gasoline platforms where integration, voltage resilience, and diagnostic capability are critical.
FAQ
What is the primary function of the MM912KS812AMAF in engine control systems?
The MM912KS812AMAF serves as a fully integrated engine control SiP, combining an S12XS MCU and MC33812 analog driver to execute real-time combustion control, manage injector/ignition/relay/lamp outputs, and support OBD-II diagnostics via ISO-9141. Its architecture eliminates external driver ICs while maintaining deterministic timing between computation and actuation - a key requirement for the MM912KS812AMAF in motorcycle and small-engine applications.
Does the MM912KS812AMAF support CAN communication?
Yes, the MM912KS812AMAF includes an msCAN 2.0B controller with dedicated TXCAN (Pin PM1) and RXCAN (Pin PM0) pins, enabling high-speed vehicle network communication. This functionality resides in the S12XS MCU portion and operates independently of the ISO-9141 K-Line interface, allowing the MM912KS812AMAF to serve dual-protocol ECUs where CAN handles sensor/actuator messaging and K-Line handles service tool access.
How does the MM912KS812AMAF handle fault detection and reporting?
The MM912KS812AMAF implements dedicated hardware fault reporting through three logic-level outputs: INJFLT (Pin 94), RELFLT (Pin 95), and IGNFLT (Pin 96). Each signals open-load, overcurrent, or short-circuit conditions in their respective driver channels. These outputs connect directly to MCU GPIOs, enabling immediate interrupt-driven diagnostics without polling - a core safety feature built into the MM912KS812AMAF's analog die architecture.
What is the role of the VCCREF and VCCSENS pins on the MM912KS812AMAF?
VCCREF (Pin 32) provides base drive voltage for an external PNP pass transistor, while VCCSENS (Pin 31) feeds back the regulated +5.0 V output to the internal VCC pre-regulator. Together, they enable precise, load-compensated regulation of the MCU's supply rail across the full 4.7–36 V VPWR range. This closed-loop configuration ensures stable operation of the MM912KS812AMAF even during cranking or load-dump events.
Is the MM912KS812AMAF pin-compatible with other members of the MM912_S812 family?
Yes, the MM912KS812AMAF shares identical 100-pin LQFP-EP packaging and pin mapping with MM912JS812AMAF and all documented variants in the MM912_S812 family. Differences are limited to internal flash (256 KB vs. 128 KB) and RAM (12 KB vs. 8 KB); no changes exist in I/O assignment, power domains, or peripheral pinouts - enabling drop-in replacement where firmware fits within the smaller memory variant.
MM912KS812AMAF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 100-LQFP Exposed Pad
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Applications:
- Engine Control
- Core Processor:
- S12XS
- Program Memory Type:
- FLASH (256kB)
- Controller Series:
- HCS12
- RAM Size:
- 12K x 8
- Interface:
- CAN, SCI, SPI
- Number of I/O:
- 6
- Voltage - Supply:
- 4.7V ~ 36V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 100-LQFP-EP (14x14)
MM912KS812AMAF FAQ
1.How can I place an order for MM912KS812AMAF through Aetrix?
Please submit a Request for Quotation (RFQ) for MM912KS812AMAF 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 MM912KS812AMAF reliable?
The price and inventory of MM912KS812AMAF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM912KS812AMAF is usually 5 days.
3.What payment methods are accepted for MM912KS812AMAF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM912KS812AMAF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MM912KS812AMAF?
MM912KS812AMAF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MM912KS812AMAF 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 MM912KS812AMAF?
For technical support, including MM912KS812AMAF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM912KS812AMAF requirements.
6.How does Aetrix verify that MM912KS812AMAF is sourced from the original manufacturer or authorized distributors?
All MM912KS812AMAF 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 MM912KS812AMAF meets industry standards.
7.What is the process for return or replacement of MM912KS812AMAF?
All MM912KS812AMAF units undergo pre-shipment inspection (PSI). If there is an issue with MM912KS812AMAF, 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 MM912KS812AMAF part is unused and in its original packaging.
Return procedure for MM912KS812AMAF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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