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Freescale Semiconductor Document Number: MMA955xL

Data Sheet: Advance Information Rev. 3, 9/2013

An Energy Efficient Solution by Freescale

This document contains information on a new product. Specifications and information herein

are subject to change without notice.

Xtrinsic MMA955xL Intelligent

Motion-Sensing Platform

The MMA955xL device is a member of Freescale’s Xtrinsic family of intelligent

sensor platforms. This device incorporates dedicated accelerometer MEMS

transducers, signal conditioning, data conversion, and a 32-bit programmable

microcontroller.

This unique blend transforms Freescale’s MMA955xL into an intelligent, high-

precision, motion-sensing platform able to manage multiple sensor inputs. This

device can make system-level decisions required for sophisticated applications

such as gesture recognition, pedometer functionality, tilt compensation and

calibration, and activity monitoring.

The MMA955xL device is programmed and configured with the CodeWarrior

Development Studio for Microcontrollers software, version 10.1 or later. This

standard integrated design environment enables customers to quickly

implement custom algorithms and features to exactly match their application

needs.

Using the master I

C port, the MMA955xL device can manage secondary

sensors, such as pressure sensors, magnetometers, or gyroscopes. This

allows sensor initialization, calibration, data compensation, and computation

functions to be off-loaded from the system application processor. The

MMA955xL device also acts as an intelligent sensing hub and a highly

configurable decision engine. Total system power consumption is significantly

reduced because the application processor stays powered down until

absolutely needed.

Hardware Features

• Three accelerometer operating ranges:

–±2g suits most hand gestures (orientation detection and tilt control) and

freefall. For tap detection, ±4 g and ±8 g are supported.

–±4g covers most regular human dynamics (walking and jogging)

–±8g detects most abrupt activities (gaming)

• Integrated temperature sensor

• One slave SPI or I

C interface operating at up to 2 Mbps, dedicated to

communication with the host processor

. Default value of the I

C, 7-bit

address is 0x4C. (This can be customized by firmware.)

• One master I

C interface operating at up to 400 kbps that can be used to

communicate with external sensors

• Eight selectable output data rates (ODR), from 488 Hz to 3.8 Hz (extending

farther from 3906 Hz to 0.24 Hz with MMA9559L Firmware version)

• 10, 12, 14, and 16-bit trimmed ADC data formats available

• 1.8 V supply voltage

• 32-bit ColdFire V1 CPU with MAC unit

• Extensive set of power-management features and low-power modes

• Integrated ADC can be used to convert external analog signals

• Single-Wire, Background-Debug Mode (BDM) pin interface

• 16-KB flash memory

• 2-KB Random Access Memory

• ROM-based flash controller and slave-port, command-line interpreter

• Two-channel timer with input capture, output capture, or edge-aligned PWM

• Programmable delay block for scheduling events relative to start of frame

• A 16-bit, modulo timer for scheduling periodic events

• Minimal external component requirements

• RoHS compliant (–40ºC to +85ºC), 16-pin, 3 x 3 x 1-mm LGA package

16-pin LGA

3 mm x 3 mm x 1 mm

Case 2094-01

MMA955xL

Top and bottom view

Top view

Pin connections

678

16 15 14

RGPIO7/AN1/

TPMCH1

RGPIO8/PDB_B

SDA0/RGPIO1/SDI

BKGD-MS

/RGPIO9

RESETB

SCL0/RGPIO0

SCLK

RGPIO2/SCL1/SDO

RGPIO3/SDA1/SSB

RGPIO6/AN0

TPMCH0

RGPIO5/PDB_A/

INT_O

RGPIO4/INT

DDA

SSA

Summary of content (26 pages)

PAGE 1
Freescale Semiconductor Data Sheet: Advance Information Document Number: MMA955xL Rev. 3, 9/2013 An Energy Efficient Solution by Freescale Xtrinsic MMA955xL Intelligent Motion-Sensing Platform MMA955xL The MMA955xL device is a member of Freescale’s Xtrinsic family of intelligent sensor platforms. This device incorporates dedicated accelerometer MEMS transducers, signal conditioning, data conversion, and a 32-bit programmable microcontroller.
PAGE 2
Software Features This device can be programmed to provide any of the following: • Orientation detection (portrait/landscape) • High-g/Low-g threshold detection • Pulse detection (single, double and directional tap) • Tilt detection • Auto wake/sleep • Embedded, smart FIFO • Power management • Pedometer A selection of the software features are included in the factory-programmed firmware for some devices. Users may add their own features with user firmware.
PAGE 3
Contents 1 2 3 4 5 Variations of MMA955xL Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Typical Applications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 4
1 Variations of MMA955xL Device Freescale offers a variety of firmware versions for the MMA955xL devices. The different versions of the device are identified by the fourth digit in the part number (for example MMA9559L). Information and specifications provided in this data sheet are independent of the Freescale firmware versions. The following table lists some of the variations among the MMA955xL-platform devices. Table 2.
PAGE 5
Table 2.
PAGE 6
2 Typical Applications This low-power, intelligent sensor platform is optimized for use in portable and mobile consumer products such as: • Tablets/PMPs/PDAs/digital cameras – Orientation detection (portrait/landscape) – Image stability – Tilt-control enabled with higher resolution – Gesture recognition – Tap to control – Auto wake/sleep for low power consumption • Smartbooks/ereaders/netbooks/laptops – Anti-theft – Freefall detection for hard-disk drives – Orientation detection – Tap detection • Pedomete
PAGE 7
3 General Description 3.1 Functional Overview The MMA955xL device consists of a 3-axis, MEMS accelerometer and a mixed-signal ASIC with an integrated, 32-bit CPU. The mixed-signal ASIC can be utilized to measure and condition the outputs of the MEMS accelerometer, internal temperature sensor, or a differential analog signal from an external device. The calibrated, measured sensor outputs can be read via the slave I2C or SPI port or utilized internally within the MMA955xL platform.
PAGE 8
– – – – • General-Purpose Timer/PWM Module (TPM) I2C master interface I2C or SPI slave interface System Integration Module (SIM) Clock-Generation Module The slave interfaces (either SPI or I2C) operate independently of the CPU subsystem. They can be accessed at any time, including while the device is in low-power, deep-sleep mode. 3.
PAGE 9
3.2.2 Sensing Direction and Output Response The following figure shows the device’s default sensing direction when measuring gravity in a static manner. Also included are the standard abbreviations or names for the six different orientation modes: portrait up/down, landscape left/right and back/front.
PAGE 10
3.3 Pin Function Descriptions This section provides a brief description of the various pin functions available on the MMA955xL platform. Ten of the device pins are multiplexed with Rapid GPIO (RGPIO) functions. The “Pin Function #1” column in Table 3 on page 9 lists which function is active when the hardware exits the Reset state. Freescale or user firmware can use the pin mux-control registers in the System Integration Module (SIM) to change pin assignments for each pin after reset.
PAGE 11
• Place 0.01 to 0.1 µF capacitors as close as possible to the package supply pins to meet the minimum bypass requirement. The recommended bypass configuration is to place one bypass capacitor on each of the VDD/VSS pairs. VDDA/VSSA ceramic and tantalum capacitors tend to provide better tolerances. Ensure that capacitor leads and associated printed-circuit traces that connect to the chip VDD and VSS (GND) pins are as short as possible.
PAGE 12
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PAGE 13
3.4.4 MMA955xL Platform as a Sensor Hub The MMA955xL device includes: • a powerful 32-bit ColdFire V1 CPU • a second I2C bus • one external analog input These features can all be monitored using the on-chip ADC. The combination of low power consumption and powerful features means that the MMA955xL platform can effectively operate as a power controller for handheld units such as industrial scanners, PDAs, and games.
PAGE 14
4 Mechanical and Electrical Specifications This section contains electrical specification tables and reference timing diagrams for the MMA955xL device, including detailed information on power considerations, DC/AC electrical characteristics, and AC timing specifications. 4.1 Definitions Cross-axis sensitivity The proportionality constant that relates a variation of accelerometer output to cross acceleration.
PAGE 15
4.4 Operating Conditions Table 5. Nominal operating conditions Rating 4.5 Symbol Min Typ Max Unit Digital supply voltage VDD 1.71 1.8 1.89 V Analog supply voltage VDDA 1.71 1.8 1.89 V Voltage difference, VDD to VDDA VDD - VDDA -0.1 — 0.1 V Voltage difference, VSS to VSSA VSS - VSSA -0.1 — 0.1 V Input voltage high VIH 0.7*VDD — VDD+0.1 V Input voltage low VIL VSS - 0.3 — 0.
PAGE 16
4.7 Supply Current Characteristics Table 8. Supply current characteristics(1) Characteristic Supply current in STOPNC mode Supply current in STOPSC mode Supply current in RUN mode(2) 1. 2. Symbol Condition(s) Min Typ Max Unit IDD-SNC Internal clocks disabled — 2 — µA IDD-SSC Internal clock in slow-speed mode — 15 — µA IDD-R Internal clock in fast mode — 3.1 — mA All conditions at nominal supply: VDD = VDDA = 1.8V.
PAGE 17
Table 10. ADC characteristics(1) Symbol Condition(s) Min Typ Max Unit Integral nonlinearity Characteristic INL Full Scale — ±15 — LSB Differential nonlinearity DNL — — ±2 — LSB IIA — — — ±2 µA Input leakage 1. All conditions at nominal supply: VDD = VDDA = 1.8 V and RES = 14, unless otherwise noted. 4.10 ADC Sample Rates The MMA955xL platform supports the following sample rates: • 488.28 frames per second (fps) • 244.14 fps • 122.07 fps • 61.04 fps • 30.52 fps • 15.
PAGE 18
4.11 AC Electrical Characteristics Tests are conducted using the input levels specified in Table 5 on page 15. Unless otherwise specified, propagation delays are measured from the 50-percent to 50-percent point. Rise and fall times are measured between the 10-percent and 90-percent points, as shown in the following figure. Low VIH Input Signal High 90% 50% 10% Midpoint1 VIL Fall Time Rise Time Note: The midpoint is VIL + (VIH – VIL)/2. Figure 7.
PAGE 19
I2C Timing 4.13 This device includes a slave I2C module that can be used to control the sensor and can be active 100 percent of the time. It also includes a master/slave I2C module that should be used only during CPU run mode (D). SDA tf tf tSU; DAT tr tLOW tHD; STA tr tSP tBUF SCL tSU; STA tHD; STA S tHD; DAT tSU; STO SR tHIGH P S Figure 9. I2C standard and fast-mode timing 4.13.1 Slave I2C Table 12.
PAGE 20
4.14 Slave SPI Timing The following table describes the timing requirements for the SPI system. The “#” column refers to the numbered time period in Figure 10. Table 14. Slave SPI timing # Function Symbol Min Max Unit fop 0 FOPH/4 Hz SCLK period tSCLK 4 — tCYCH — Operating frequency 1 2 Enable lead time tLead 0.5 — tCYCH 3 Enable lag time tLag 0.
PAGE 21
4.15 Flash Parameters The MMA955xL platform has 16 KB of internal flash memory. There are ROM functions that allow erase and programming of that memory. Chip supply voltage of 1.8 V is sufficient for the flash programming voltage. The lower portion of the flash memory is occupied by Freescale factory firmware and is protected so that a user cannot erase it. The size of the available flash memory varies between the different devices in the MMA955xL product family, as shown in the following figure.
PAGE 22
5 Package Information The MMA955xL platform uses a 16-lead LGA package, case number 2094.Use the following link for the latest diagram of the package: www.freescale.com/files/shared/doc/package_info/98ASA00287D.pdf 5.1 Footprint and pattern information Pin 16 Pin 1 ID Pin 1 Package pad size 0.24mm x 0.35 mm Figure 12. Package bottom view PCB land extension From the edge of the package PCB land pad PCB pad distance to package edge Package size (Measurements in mm) Figure 13.
PAGE 23
PCB land pad size 0.65 mm x 0.25 mm Solder mask opening 0.777 mm x 1.377 mm (PCB land + 0.0637 mm larger all around. Remove slivers between pads.) Solder stencil opening 0.62 mm x 0.22 mm (PCB land - 0.015 mm smaller all around) Figure 14. Recommended PCB footprint 5.2 Marking ! "! ! MMA955xL Sensors Freescale Semiconductor, Inc.
PAGE 24
5.3 Tape and reel information Figure 15. Tape dimensions The devices are oriented on the tape as shown in Figure 16. The dot marked on each device indicates pin 1. Pin 1 Direction to unreel Barcode label side of reel Figure 16. Tape and reel orientation MMA955xL 24 Sensors Freescale Semiconductor, Inc.
PAGE 25
6 Revision History Revision number Revision date 0 06/2011 Initial release of document. 1 10/2011 • • • • Added the MMA9559L device. Added a features table and a package land diagram figure.
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How to Reach Us: Information in this document is provided solely to enable system and software Home Page: freescale.com implementers to use Freescale products. There are no express or implied copyright Web Support: freescale.com/support information in this document. licenses granted hereunder to design or fabricate any integrated circuits based on the Freescale reserves the right to make changes without further notice to any products herein.