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NXP Semiconductors MMA9550LR1
- Part No.:
- MMA9550LR1
- Manufacturer:
- NXP Semiconductors
- Category:
- Accelerometers
- Package:
- 16-VFLGA
- Datasheet:
-
MMA9550LR1.pdf
- Description:
- ACCELEROMETER 2-8G I2C/SPI 16LGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,707
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Product details
Overview
MMA9550LR1 from NXP Semiconductors (formerly Freescale) is an intelligent 3-axis motion-sensing platform integrating a MEMS accelerometer, 32-bit ColdFire V1 MCU, 16-KB flash, and dual I²C interfaces. It delivers ±2/±4/±8 g acceleration ranges, 10–16-bit ADC resolution, and operates at 1.8 V for ultra-low-power portable applications including orientation detection, tap recognition, and tilt compensation in tablets and wearables.
For engineers reviewing the MMA9550LR1 datasheet, MMA9550LR1 pinout, MMA9550LR1 application, or MMA9550LR1 equivalent, this page provides verified technical context, validated pin functions, confirmed firmware-defined motion-sensing capabilities, and real-world integration guidance for host-processor offload and system-level decision-making in battery-constrained devices.
Technical Context
The MMA9550LR1 implements a dedicated motion-sensing architecture with hardware-accelerated front-end processing-including programmable anti-aliasing filters, high-pass/low-pass digital filtering, and g-mode-dependent resolution scaling-executed autonomously by its embedded 32-bit CPU. Its slave I²C interface (default address 0x4C) enables direct host communication while the master I²C port (400 kbps) manages external sensors like magnetometers or pressure transducers.
It supports eight output data rates (3.8 Hz to 488 Hz), real-time preemptive scheduling, and integrated power management with Auto-Wake/Auto-Sleep modes. The device boots into factory-programmed motion-sensing firmware and uses RGPIO pins for configurable interrupt generation, timer capture, and analog input (AN0/AN1) with differential 1.8 V full-scale range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Accelerometer Range | ±2 g, ±4 g, ±8 g - selectable per application: ±2 g for orientation/tilt, ±4 g for walking/jogging, ±8 g for gaming/shock events |
| ADC Resolution | 10/12/14/16-bit - higher bit depth enables finer motion discrimination in low-dynamic-range scenarios |
| Output Data Rate | 3.8 Hz to 488 Hz - supports low-power activity monitoring and responsive gesture detection |
| Supply Voltage | 1.8 V - matches modern low-voltage SoC I/O domains and minimizes quiescent current |
| Memory | 16 KB flash / 2 KB RAM - sufficient for factory motion firmware plus user extensions (6.5 KB user flash available) |
| I²C Interfaces | Slave (up to 2 Mbps, addr 0x4C) + Master (400 kbps) - enables bidirectional host control and sensor hub functionality |
| Package | 16-pin LGA, 3 mm × 3 mm × 1 mm - compact footprint suitable for space-constrained mobile PCBs |
Pinout & Package
16-pin LGA package (Case 2094-01), 3 mm × 3 mm × 1 mm, RoHS-compliant, operating from –40°C to +85°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD / VDDA | Digital & analog power supply | Separate 1.8 V rails minimize noise coupling; VDD must power up before or simultaneously with VDDA |
| VSS / VSSA | Digital & analog ground | Independent ground planes required; physical separation prevents analog signal corruption |
| SCL0 / SDA0 | Slave I²C clock/data | Default host interface; 7-bit address 0x4C; supports up to 2 Mbps for fast configuration reads |
| SCL1 / SDA1 | Master I²C clock/data | Drives external sensors; 400 kbps rate balances speed and noise immunity in multi-sensor systems |
| RESETB | Active-low reset input | Open-drain, bidirectional; pulled high at startup to boot application code; asserts internal POR |
| BKGD-MS | Background-debug / mode select | Pulled high = normal boot; pulled low = BDM entry; internal pullup allows floating in production |
| RGPIO4 / INT | Interrupt input | Level-7 priority wake source; programmable edge/level trigger for motion event notification to host |
| RGPIO6 / AN0 RGPIO7 / AN1 | Analog input pair | Differential ADC inputs; 1.8 V full-scale; synchronized to accelerometer ODR for correlated sensing |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed motion firmware | Immediate orientation detection, tilt compensation, and freefall response without custom coding |
| Dual I²C interface architecture | Offloads sensor fusion and calibration from host processor, reducing system-level power by keeping AP asleep |
| Programmable delay block (PDB) | Enables precise timing of motion-triggered actions relative to frame start, critical for gesture synchronization |
| Embedded 32-bit ColdFire V1 core | MAC unit and real-time preemptive scheduler support on-device algorithm execution (e.g., pedometer step counting) |
| Integrated temperature sensor | Compensates accelerometer offset drift across –40°C to +85°C, maintaining accuracy in consumer environments |
Applications
| Tablet Orientation Control | Smartbook Freefall Protection |
|---|---|
Use Scenario: Automatic screen rotation between portrait and landscape modes based on gravity vector alignment. IC Role / Device Role / Timing Role: Primary motion-sensing hub performing real-time 3-axis acceleration analysis and orientation classification. Use Value: Eliminates need for host CPU polling; achieves sub-100 ms orientation response using on-device firmware logic. | Use Scenario: Detecting sudden vertical drop to trigger hard disk drive head parking before impact. IC Role / Device Role / Timing Role: High-g threshold detector with configurable ±4 g/±8 g sensitivity and programmable debounce window. Use Value: Reduces false triggers via built-in high-pass filtering and auto-wake capability ensures immediate response from deep-sleep state. |
| Gaming Motion Input | Wearable Activity Monitor |
Use Scenario: Translating handheld controller tilt and shake into in-game character movement or weapon recoil. IC Role / Device Role / Timing Role: Low-latency motion engine delivering synchronized 488 Hz ODR data with embedded tap/double-tap detection. Use Value: Enables responsive gameplay without host-side latency; PDB timers align actuator feedback precisely with motion events. | Use Scenario: Continuous low-power tracking of daily steps, posture transitions, and sedentary alerts in fitness bands. IC Role / Device Role / Timing Role: Autonomous activity classifier running background firmware with adaptive ODR scaling (3.8–488 Hz). Use Value: Achieves >14-day battery life via Auto-Sleep mode and host wake-on-interrupt, eliminating constant polling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar motion-sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMA9551LR1 | Factory-loaded gesture firmware; includes portrait/landscape, tap/double-tap, and tilt detection algorithms not present in MMA9550LR1 | Optimized for UI interaction (e.g., tap-to-wake, swipe navigation); lacks MMA9550LR1's general-purpose motion-sensing flexibility | Select MMA9551LR1 when gesture-specific features are required out-of-box; no firmware development needed |
| MMA9553LR1 | Preloaded pedometer firmware with step-counting, distance estimation, and activity monitoring; reduced user flash (1.0 KB) vs. MMA9550LR1 (6.5 KB) | Targeted at wearable step-tracking; does not support orientation or tap detection natively | Choose MMA9553LR1 for dedicated activity monitoring; MMA9550LR1 preferred for multi-function motion platforms |
Compared with MMA9551LR1 and MMA9553LR1, the MMA9550LR1 offers broader motion-sensing versatility with factory motion firmware and maximum user flash allocation, making it ideal for applications requiring custom algorithm extension rather than fixed-function behavior.
Availability
MMA9550LR1 is available at Aetrix Electronics and suitable for tablet orientation control, smartbook freefall protection, gaming motion input, and wearable activity monitoring requiring stable component supply across industrial and consumer design cycles.
Supply support for MMA9550LR1 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 focused on secure connectivity solutions for automotive, industrial, and IoT applications.
The MMA9550LR1 belongs to NXP's intelligent motion-sensing platform family, designed to reduce host processor load through autonomous sensor fusion, real-time motion classification, and ultra-low-power operation in portable electronics.
FAQ
What is the default I²C address of the MMA9550LR1?
The MMA9550LR1 defaults to a 7-bit slave I²C address of 0x4C. This address can be customized via firmware configuration, but 0x4C is used out-of-box for host communication. The MMA9550LR1 supports standard-mode and fast-mode I²C up to 2 Mbps, enabling rapid register access during initialization and runtime parameter updates.
Does the MMA9550LR1 require external programming to function?
No, the MMA9550LR1 ships with factory-programmed motion-sensing firmware and operates immediately upon power-up. It performs orientation detection, tilt compensation, and freefall response without user code. Custom algorithms can be added using the available 6.5 KB of user flash memory, but basic motion functionality is fully operational at first power-on.
How does the MMA9550LR1 manage power in battery-powered devices?
The MMA9550LR1 reduces system power by enabling the host application processor to remain in deep sleep until motion events occur. Its Auto-Wake/Auto-Sleep modes, configurable ODR (3.8–488 Hz), and programmable interrupt outputs (e.g., RGPIO4/INT) allow precise control over active/idle states. Typical current draw in stop mode is under 1 µA, extending battery life in wearables and portable electronics.
Can the MMA9550LR1 interface with non-I²C sensors?
Yes-the MMA9550LR1 includes a dedicated master I²C interface (400 kbps) that can communicate with external I²C sensors such as magnetometers or pressure transducers. For SPI or analog sensors, its two ADC inputs (AN0/AN1) accept differential 1.8 V signals, and RGPIO pins can be configured for GPIO, PWM, or timer functions to support custom interface protocols.
What is the role of the BKGD-MS pin on the MMA9550LR1?
The BKGD-MS pin serves dual roles: during startup, it selects boot mode (high = application code, low = Background-Debug Mode); during operation, it functions as a single-wire debug port for CodeWarrior-based firmware download and real-time debugging. An internal pullup resistor allows it to float in production, simplifying board layout while retaining in-circuit debug capability during development.
MMA9550LR1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 16-VFLGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Digital
- Axis:
- X, Y, Z
- Acceleration Range:
- ±2g, 4g, 8g
- Sensitivity (LSB/g):
- 16393 (±2g) ~ 4098 (±8g)
- Sensitivity (mV/g):
- -
- Bandwidth:
- 1.9Hz ~ 244Hz
- Output Type:
- I2C, SPI
- Voltage - Supply:
- 1.71V ~ 1.89V
- Features:
- Adjustable Bandwidth, Selectable Scale, Sleep Mode, Temperature Sensor
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-LGA (3x3)
MMA9550LR1 FAQ
1.How can I place an order for MMA9550LR1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMA9550LR1 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 MMA9550LR1 reliable?
The price and inventory of MMA9550LR1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMA9550LR1 is usually 5 days.
3.What payment methods are accepted for MMA9550LR1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMA9550LR1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMA9550LR1?
MMA9550LR1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMA9550LR1 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 MMA9550LR1?
For technical support, including MMA9550LR1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMA9550LR1 requirements.
6.How does Aetrix verify that MMA9550LR1 is sourced from the original manufacturer or authorized distributors?
All MMA9550LR1 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 MMA9550LR1 meets industry standards.
7.What is the process for return or replacement of MMA9550LR1?
All MMA9550LR1 units undergo pre-shipment inspection (PSI). If there is an issue with MMA9550LR1, 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 MMA9550LR1 part is unused and in its original packaging.
Return procedure for MMA9550LR1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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