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NXP Semiconductors S9S12G128AMLF
- Part No.:
- S9S12G128AMLF
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
S9S12G128AMLF.pdf
- Description:
- IC MCU 16BIT 128KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,240
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Product details
Overview
S9S12G128AMLF from NXP Semiconductors (formerly Freescale) is a 16-bit automotive-grade microcontroller based on the S12 CPU12 core, featuring 128 KB on-chip Flash memory with ECC, 8 KB SRAM, and integrated CAN 2.0A/B controller. It operates at up to 25 MHz, supports -40°C to +125°C ambient temperature, and includes 12-bit ADC (8-channel), 8-bit DAC, PWM, and BDM debug interface - deployed in engine control units and body electronics.
For engineers reviewing the S9S12G128AMLF datasheet, S9S12G128AMLF pinout, S9S12G128AMLF application, or S9S12G128AMLF equivalent, key selection criteria include AEC-Q100 Grade 1 qualification, CAN bus integration, Flash ECC support, and 125°C operation for under-hood automotive use cases.
Technical Context
The S9S12G128AMLF implements the legacy S12 CPU12 architecture with 16-bit data path and 24-bit addressing, executing instructions from internal Flash or external memory via expanded multiplexed bus. Its clock system combines internal RC oscillator (1–8 MHz), external crystal (1–32 MHz), and IPLL for stable high-frequency operation up to 25 MHz.
System integrity features include COP watchdog timer, low-voltage detection, and background debug module (BDM) with single-wire serial interface. Memory protection is enforced via security byte and flash block locking, while peripheral modules (MSCAN, ADC, PWM) are mapped into fixed register space with interrupt vectoring via 8-level priority scheme.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | S12 CPU12 16-bit CISC core with 24-bit address bus - enables deterministic real-time control and legacy code compatibility. |
| Flash Memory | 128 KB on-chip Flash with ECC and 1K EEPROM emulation - ensures program integrity and data retention over 100k erase/write cycles. |
| SRAM | 8 KB on-chip SRAM - sufficient for stack, variables, and CAN message buffers in compact ECU designs. |
| Clock Speed | Max 25 MHz system frequency - delivers ~25 MIPS throughput suitable for mid-complexity automotive control loops. |
| ADC Resolution | 12-bit successive-approximation ADC with 8 input channels - supports precise sensor signal acquisition (e.g., throttle position, coolant temp). |
| Operating Temp | -40°C to +125°C ambient - qualified per AEC-Q100 Grade 1 for under-hood deployment without derating. |
| CAN Interface | One MSCAN 2.0A/B module with 15 message buffers - enables robust vehicle network communication with hardware filtering and error handling. |
Pinout & Package
Package: 64-pin LQFP (10 mm × 10 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDX | Power supply inputs | Digital, analog, and external bus power domains - require separate decoupling to minimize noise coupling into ADC/DAC. |
| VSS, VSSA, VSSX | Ground returns | Independent ground planes for digital logic, analog circuitry, and external bus - critical for signal integrity in mixed-signal operation. |
| RESET | Active-low reset input | Asynchronous reset with internal pull-up; accepts external reset IC or microcontroller supervisor signals. |
| XTAL, EXTAL | Crystal oscillator terminals | Supports 4–8 MHz fundamental-mode crystals for primary clock source with ±0.5% stability over temperature. |
| PORTA[7:0] | General-purpose I/O / ADC inputs | 8-bit port with configurable pull-ups and ADC channel mapping (AD0–AD7) - used for sensor interface and digital control outputs. |
| PORTB[7:0] | General-purpose I/O / CAN TX/RX | Includes CANH/CANL differential pair (PB0/PB1) - enables direct CAN bus connection without transceiver isolation in non-isolated nodes. |
| PORTC[7:0] | General-purpose I/O / PWM outputs | Supports 8-channel PWM generation (PWM0–PWM7) - drives solenoids, fans, and LED dimming with programmable duty cycle and period. |
| PORTD[7:0] | General-purpose I/O / SCI/SPI | Configurable as UART (SCI) or SPI master/slave - used for diagnostics, bootloader communication, or sensor daisy-chaining. |
| PORTP[7:0] | General-purpose I/O / BDM interface | Includes BKGD pin for single-wire background debug - allows in-circuit programming and real-time debugging without JTAG header. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use from -40°C to +125°C ambient - eliminates need for external thermal derating in engine bay applications. |
| On-chip Flash with ECC | Detects and corrects single-bit errors in real time - prevents silent corruption of control firmware during radiation exposure or voltage droop. |
| Integrated MSCAN 2.0B | Hardware message buffering and acceptance filtering - reduces CPU load during high-bandwidth CAN traffic (e.g., powertrain broadcast). |
| 12-bit ADC with internal reference | 12-bit resolution with 4.97 V internal reference - achieves ±1 LSB INL across temperature without external precision reference. |
| Background Debug Module (BDM) | Single-wire debug interface with flash programming capability - enables field firmware updates and production-line calibration without JTAG adapter. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Real-time monitoring of crankshaft position, throttle angle, and oxygen sensor feedback to compute fuel injection timing and spark advance. IC Role / Device Role / Timing Role: Primary control MCU executing closed-loop combustion algorithms with sub-millisecond interrupt latency. Use Value: Integrated 12-bit ADC and CAN enable direct sensor interfacing and vehicle network reporting without external signal conditioning or protocol translation. | Use Scenario: Centralized management of door locks, window lifts, interior lighting, and HVAC fan speed in passenger compartment. IC Role / Device Role / Timing Role: System coordinator communicating via CAN with gateway and LIN slaves for distributed actuation. Use Value: 8 KB SRAM and 128 KB Flash support multi-function firmware with diagnostic logging and OTA update capability. |
| Transmission Control Unit (TCU) | Electric Power Steering (EPS) |
Use Scenario: Gear shift decision logic based on vehicle speed, engine torque, and driver input, with hydraulic pressure modulation via PWM-driven solenoids. IC Role / Device Role / Timing Role: Safety-critical controller requiring ASIL-B compliance through ECC, watchdog, and voltage monitoring. Use Value: AEC-Q100 Grade 1 rating and built-in COP watchdog ensure functional safety without external monitoring ICs. | Use Scenario: Torque assist calculation using steering angle, motor current, and vehicle speed inputs, driving three-phase inverter via PWM outputs. IC Role / Device Role / Timing Role: Motor control MCU with precise PWM timing (100 ns resolution) and fast ADC sampling for current loop closure. Use Value: 8-channel PWM with dead-time insertion and synchronized ADC triggers reduce external gate driver complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC9S12G128MALR | Same die, 48-pin QFP package with reduced I/O count (40 GPIO vs. 50) and no CAN transceiver pins routed. | Limited peripheral access; unsuitable for CAN-centric designs requiring full message buffer utilization. | Select only when board space constraints prohibit 64-pin LQFP and CAN usage is minimal or offloaded externally. |
| S912ZVL128F0MLFR | Z-series derivative with S12Z core, enhanced PWM (16-bit), LINPHY, and improved flash endurance (200k cycles). | Higher integration for next-gen body electronics; requires toolchain migration and layout revision. | Choose for new designs targeting extended lifecycle, LIN support, or higher-resolution motor control - not drop-in compatible. |
Compared with MC9S12G128MALR, the S9S12G128AMLF provides full CAN routing and 10 additional GPIOs for sensor expansion; versus S912ZVL128F0MLFR, it offers proven qualification and lower software migration cost but lacks LIN and advanced PWM features.
Availability
S9S12G128AMLF is available at Aetrix Electronics and suitable for engine control units, transmission control modules, and electric power steering systems requiring stable component supply across automotive production lifecycles.
Supply support for S9S12G128AMLF 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 company specializing in secure connectivity solutions for automotive, industrial, and IoT markets, with roots in Freescale's automotive MCU leadership.
The S12G family was designed specifically for cost-sensitive, high-reliability automotive applications such as body electronics and powertrain subsystems where legacy code compatibility and AEC-Q100 compliance are mandatory.
FAQ
What is the maximum operating frequency of the S9S12G128AMLF?
The S9S12G128AMLF supports a maximum system clock frequency of 25 MHz, achieved via its internal phase-locked loop (IPLL) when driven by an external 8 MHz crystal. This yields approximately 25 million instructions per second (MIPS) performance, sufficient for real-time control tasks in automotive ECUs. The S9S12G128AMLF maintains timing specifications across its full -40°C to +125°C operating range without derating.
Does the S9S12G128AMLF include built-in Flash error correction?
Yes, the S9S12G128AMLF integrates ECC (Error Correction Code) logic for its 128 KB on-chip Flash memory. It detects and corrects all single-bit errors and detects double-bit errors in real time during read operations. This feature is enabled by default after reset and is essential for meeting ISO 26262 ASIL-B requirements in safety-critical automotive applications using the S9S12G128AMLF.
Can the S9S12G128AMLF operate without an external crystal?
Yes, the S9S12G128AMLF can operate using its internal RC oscillator (IRC) running at 1–8 MHz, allowing crystal-free startup for basic functionality. However, for CAN communication, precise timing, or production-grade accuracy, an external crystal (typically 4–8 MHz) is required to feed the IPLL. The S9S12G128AMLF's IRC alone does not meet CAN bit-timing tolerance requirements.
How many CAN message buffers does the S9S12G128AMLF support?
The S9S12G128AMLF includes one MSCAN 2.0B module with 15 dedicated message buffers - 8 receive and 7 transmit - each configurable for standard (11-bit) or extended (29-bit) identifiers. These buffers support hardware acceptance filtering and FIFO-like prioritization, reducing CPU overhead during high-traffic CAN bus operation in systems using the S9S12G128AMLF.
Is the S9S12G128AMLF pin-compatible with other S12G family members?
No, the S9S12G128AMLF is not fully pin-compatible with other S12G variants due to differences in peripheral routing and package options. While it shares the 64-pin LQFP footprint with S9S12G128F0MLF, pin functions for CAN, ADC, and PWM differ across speed grades and memory configurations. Board design must be validated against the specific S9S12G128AMLF pinout diagram - not assumed from family-level documentation.
S9S12G128AMLF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 48-LQFP
- Series:
- HCS12
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- 12V1
- Core Size:
- 16-Bit
- Speed:
- 25MHz
- Connectivity:
- CANbus, IrDA, LINbus, SCI, SPI
- Peripherals:
- LVD, POR, PWM, WDT
- Number of I/O:
- 40
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 4K x 8
- RAM Size:
- 8K x 8
- Voltage - Supply (Vcc/Vdd):
- 3.13V ~ 5.5V
- Data Converters:
- A/D 12x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
S9S12G128AMLF FAQ
1.How can I place an order for S9S12G128AMLF through Aetrix?
Please submit a Request for Quotation (RFQ) for S9S12G128AMLF 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 S9S12G128AMLF reliable?
The price and inventory of S9S12G128AMLF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for S9S12G128AMLF is usually 5 days.
3.What payment methods are accepted for S9S12G128AMLF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for S9S12G128AMLF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for S9S12G128AMLF?
S9S12G128AMLF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your S9S12G128AMLF 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 S9S12G128AMLF?
For technical support, including S9S12G128AMLF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your S9S12G128AMLF requirements.
6.How does Aetrix verify that S9S12G128AMLF is sourced from the original manufacturer or authorized distributors?
All S9S12G128AMLF 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 S9S12G128AMLF meets industry standards.
7.What is the process for return or replacement of S9S12G128AMLF?
All S9S12G128AMLF units undergo pre-shipment inspection (PSI). If there is an issue with S9S12G128AMLF, 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 S9S12G128AMLF part is unused and in its original packaging.
Return procedure for S9S12G128AMLF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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