S912XEG384BCAG - 16-bit S12X MCU 384KB Flash 50MHz | NXP
MPN: S912XEG384BCAG ✓ Active| Qty | Unit Price | Extended |
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| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
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| 500 | $0 | $0.00 |
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S912XEG384BCAG Overview
A microcontroller (MCU) is a single-chip computer that combines a CPU core, non-volatile program memory, RAM, and peripheral interfaces on one die. The S12X core sits within NXP's HCS12X family, which extends the classic HCS12 architecture with a parallel XGATE co-processor and a memory protection unit, positioning it between simple 8-bit MCUs and 32-bit automotive controllers in the embedded processing hierarchy.
Key features include 384 KB of flash program memory, a 50 MHz bus-speed S12X CPU, and the XGATE co-processor that offloads interrupt-driven tasks to build virtual peripherals and boost overall throughput. A flexible, programmable, hardware-emulated EEPROM supports data-logging without external memory. System integrity is reinforced by a memory protection unit plus supervisor and user operating modes, and the 12-bit ADC delivers 3 us conversion time for fast control loops.
The S12X architecture uses a dual-core arrangement in which the main CPU and XGATE run concurrently from shared flash, allowing time-critical ISR handling to be delegated while the CPU executes application code. On-chip emulated EEPROM is implemented in flash with hardware wear-leveling, eliminating the cost and board space of an external serial EEPROM.
Typical applications include automotive body control modules, motor control and inverter drives, industrial automation nodes, and instrumentation requiring deterministic interrupt latency. The 144-pin LQFP provides ample GPIO for multi-channel actuator and sensor interfaces.
When designing with this device, reserve the emulated EEPROM sector and verify flash programming timing against the NXP reference manual, since EEPROM emulation shares the flash array with program code.
This page synthesizes distributor availability, drop-in alternatives, and practical design notes that are not consolidated in the manufacturer datasheet.
Drop-in alternatives for S912XEG384BCAG — 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 S912XEG384BCAG (same form factor and footprint) — differing in Co-processor, Operating Temperature, Timers, Core Processor, Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
S912XEQ384BCAG
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S12XEQ384CAG
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →S912XEG384J2VAL
✅ Drop-In✓ In Stock
$17.8 / Unit
View Datasheet →S912XEQ384F1MAL
✅ Drop-In✓ In Stock
$9.2 / Unit
View Datasheet →MC9S12XEQ384CAL
✅ Drop-In📋 Reference alternative (not in catalog)
S912XEG384BCAG Maximum Ratings & Electrical Characteristics
| Core Processor | HCS12X (S12X) |
| Core Size | 16-bit |
| Maximum Clock Frequency | 50 MHz |
| Flash Program Memory | 384 KB (384K x 8) |
| EEPROM | Flexible programmable hardware-emulated EEPROM |
| Co-processor | XGATE co-processor |
| ADC Resolution | 12-bit |
| ADC Conversion Time | 3 us |
| Timers | Enhanced Capture Timer (ECT), Periodic Interrupt Timer (PIT), Real-Time Interrupt (RTI) |
| System Integrity | Memory Protection Unit (MPU), supervisor/user modes |
| Package | 144-LQFP (20x20 mm) |
| Number of Terminals | 144 |
| Terminal Form | Gull Wing |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 C to +85 C |
| Automotive Qualification | Automotive Qualified |
S912XEG384BCAG 144-lqfp (20x20 mm) Pin Configuration Guide
Pin configuration for S912XEG384BCAG (144-lqfp (20x20 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for S912XEG384BCAG.
Refer to the datasheet for full pin configuration.
Typical Applications
S912XEG384BCAG is suitable for 6 applications: Automotive Body Control Module, Motor Control and Inverter Drives, Industrial Automation Node, Instrumentation and Data Acquisition, Automotive Gateway and Telematics, Appliance and White Goods Control.
Automotive Body Control Module
The S912XEG384BCAG fits automotive body control modules because its 384 KB flash holds multi-function body logic, its 50 MHz S12X core handles CAN and LIN message scheduling, and its XGATE co-processor offloads interrupt-driven I/O so the main CPU stays free for application state machines. The 144-LQFP provides enough GPIO for door, lighting, and wiper actuator drivers. The memory protection unit and supervisor/user modes isolate safety-critical tasks from application code. A trade-off is that the 16-bit core limits heavy floating-point work, so body algorithms should stay integer-based; the automotive qualification and -40 C to +85 C rating match cabin-mounted module environments.
Recommended
Motor Control and Inverter Drives
The S912XEG384BCAG suits motor control and inverter drives because its 12-bit ADC with 3 us conversion time samples phase currents fast enough for field-oriented control loops, while the ECT captures encoder and Hall signals with hardware timestamps. The XGATE co-processor can run the current-control ISR in parallel with the main CPU, reducing loop jitter versus a single-core MCU. The 50 MHz bus speed gives adequate headroom for PWM update math at 10-20 kHz switching. A design consideration is that the 16-bit core needs fixed-point math for Park and Clarke transforms; the 384 KB flash leaves room for motor parameter tables and bootloader code.
Recommended
Industrial Automation Node
The S912XEG384BCAG works well as an industrial automation node because its 144-LQFP GPIO count supports multi-channel digital I/O, and the ECT, PIT, and RTI timers provide deterministic scheduling for fieldbus and sensor polling. The 384 KB flash accommodates protocol stacks and configuration data, while the hardware-emulated EEPROM stores calibration and node identity without an external serial EEPROM. The memory protection unit helps contain faults in a 24/7 plant environment. A trade-off is that the 16-bit core is not suited to heavy Ethernet stacks; pair it with an external MAC/PHY for networked nodes. The -40 C to +85 C rating covers most cabinet-mounted industrial conditions.
Recommended
Instrumentation and Data Acquisition
The S912XEG384BCAG is suited to instrumentation and data acquisition because its 12-bit ADC with 3 us conversion time captures analog channels at rates suitable for sensor front ends, and the XGATE co-processor can service ADC-complete interrupts while the CPU formats and buffers samples. The 384 KB flash stores calibration coefficients and acquisition profiles, and the emulated EEPROM retains settings across power cycles. The 144-LQFP gives enough pins for multi-channel analog and digital I/O. A design consideration is ADC reference stability; use an external precision reference if measurement accuracy below the internal reference tolerance is required. The 50 MHz core handles filtering and scaling in real time.
Recommended
Automotive Gateway and Telematics
The S912XEG384BCAG can serve as an automotive gateway or telematics controller because its 50 MHz S12X core and XGATE co-processor handle multiple CAN channels and message routing with low interrupt latency, while the 384 KB flash holds routing tables and diagnostic stacks. The memory protection unit and supervisor/user modes support robust fault containment, and the automotive qualification matches in-vehicle environments. The 144-LQFP provides the pin count for multiple CAN transceivers and LIN interfaces. A trade-off is that the 16-bit core limits high-bandwidth Ethernet gateway use; for domain-controller roles, a 32-bit MPC57xx part is more appropriate. Use this device for body and comfort gateways.
Recommended
Appliance and White Goods Control
The S912XEG384BCAG fits appliance and white-goods control because its 384 KB flash holds motor-control, user-interface, and safety-monitor code in one device, and the 12-bit ADC with 3 us conversion time samples current and temperature sensors for motor and heater control. The ECT and PIT timers drive triac firing and PWM outputs, while the emulated EEPROM stores user settings and cycle counters without external memory. The 144-LQFP supports the many I/O needed for buttons, displays, and relays. A design consideration is isolation between mains-referenced sensing and logic; use optocouplers or isolated drivers. The -40 C to +85 C rating covers typical appliance electronics bays.
Recommended
Recommended Products Summary
Engineering reference data for S912XEG384BCAG — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | S912XEQ384BCAG | MC9S12XEQ384CAG | S912XEG384J2VAL | S912XEQ384F1MAL |
|---|---|---|---|---|---|
| Package | 144-LQFP (20x20) | 144-LQFP (20x20) - same | 144-LQFP (20x20) - same | 144-LQFP (20x20) - same | 144-LQFP (20x20) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core | 16-bit HCS12X (S12X) | 16-bit HCS12X (S12X) | 16-bit HCS12X (S12X) | 16-bit HCS12X (S12X) | 16-bit HCS12X (S12X) |
| Flash Memory | 384 KB | 384 KB | 384 KB | 384 KB | 384 KB |
| Maximum Frequency | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz |
| Sub-family / Peripheral Set | XEG (general purpose) | XEQ (enhanced queued ADC) | XEQ (enhanced queued ADC) | XEG (general purpose) | XEQ (enhanced queued ADC) |
| ADC | 12-bit, 3 us conversion | 12-bit enhanced queued ADC | 12-bit enhanced queued ADC | 12-bit, 3 us conversion | 12-bit enhanced queued ADC |
Key Differentiators
- XGATE co-processor for parallel ISR handling (vs MC9S12XEQ384CAG)
- General-purpose XEG peripheral set (vs S912XEQ384BCAG)
- Hardware-emulated EEPROM in flash (vs S912XEQ384F1MAL)
Design Notes
Route the 144-LQFP with a solid ground plane under the device and place 0.1 uF decoupling capacitors on every VDD pin pair as close to the package as possible. The 20x20 mm body has 0.5 mm pitch leads, so use a stencil with adequate paste release and verify solder joint fillets on the gull-wing terminals. Keep the oscillator and ADC reference traces away from high-current PWM outputs to protect the 12-bit ADC accuracy.
The hardware-emulated EEPROM shares the flash array with program code. Reserve the EEPROM sectors in the linker file and never place program code there, or EEPROM writes will corrupt application firmware. Also verify the flash programming timing and clock trim against the NXP reference manual before production programming, since an incorrect trim affects both flash timing and the ADC clock.
The XGATE co-processor runs concurrently with the S12X CPU from shared flash, so bus contention can increase worst-case interrupt latency. Profile the XGATE channel priorities and keep high-rate ISRs on XGATE while the CPU handles lower-rate tasks. For the 12-bit ADC, use a dedicated analog ground return and an external precision reference if measurement accuracy tighter than the internal reference tolerance is required.
Compliance Information
NXP product page and distributor listings state the part is Automotive Qualified; specific AEC-Q100 grade and RoHS/REACH status are not stated in the verified web data and must be confirmed in the NXP datasheet.
