RD3172MMA7455L Freescale Semiconductor, RD3172MMA7455L Datasheet - Page 2
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RD3172MMA7455L
Manufacturer Part Number
RD3172MMA7455L
Description
EVAL BOARD FOR MMA7455L
Manufacturer
Freescale Semiconductor
Series
ZSTAR3r
Datasheets
1.RD3172MMA7455L.pdf
(35 pages)
2.RD3172MMA7455L.pdf
(2 pages)
3.RD3172MMA7455L.pdf
(100 pages)
Specifications of RD3172MMA7455L
Design Resources
ZSTAR3 Schematic
Sensor Type
Accelerometer, 3 Axis
Sensing Range
±2g, 4g, 8g
Interface
RF
Sensitivity
16, 32, 64 LSB/g
Voltage - Supply
3V
Embedded
Yes, MCU, 16-Bit
Utilized Ic / Part
MMA7455
Acceleration
5000 g
Sensing Axis
Triple Axis
Output Type
Digital
Interface Type
I2C, SPI
Operating Voltage
3.6 L
Operating Current
490 uA
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
MMA7455L
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
RD3172MMA7455L
Manufacturer:
Freescale Semiconductor
Quantity:
135
Contents
ELECTRO STATIC DISCHARGE (ESD) ......................................................................................................................................6
PRINCIPLE OF OPERATION ......................................................................................................................................................8
FEATURES ..................................................................................................................................................................................9
LEVEL DETECTION ...................................................................................................................................................................10
THRESHOLD DETECTION FOR MOTION AND FREEFALL CONDITIONS ............................................................................11
PULSE DETECTION ..................................................................................................................................................................12
ASSIGNING, CLEARING & DETECTING INTERRUPTS ..........................................................................................................15
DIGITAL INTERFACE ................................................................................................................................................................16
BASIC CONNECTIONS .............................................................................................................................................................19
REGISTER DEFINITIONS .........................................................................................................................................................21
SOLDERING AND MOUNTING GUIDELINES FOR THE LGA ACCELEROMETER SENSOR TO A PC BOARD ...................29
Sensors
Freescale Semiconductor
Self-Test .........................................................................................................................................................................9
g-Select ..........................................................................................................................................................................9
Standby Mode ................................................................................................................................................................9
Measurement Mode .......................................................................................................................................................9
$18: Control 1 (Read/Write) Setting the Detection Axes for X, Y and Z .......................................................................10
$19: Control 2 (Read/Write) Motion Detection (OR Condition) or Freefall Detection (AND Condition) ........................10
$18: Control 1 (Read/Write): Setting the threshold to be an integer value or an absolute value .................................10
$1A: Level Detection Threshold Limit Value (Read/Write) ...........................................................................................10
CASE 1: Motion Detection ...........................................................................................................................................11
CASE 2: Motion Detection ...........................................................................................................................................11
CASE 3: Freefall Detection ..........................................................................................................................................11
CASE 4: Freefall Detection ..........................................................................................................................................11
$18: Control 1 (Read/Write): Disable X, Y or Z for Pulse Detection .............................................................................12
$19: Control 2 (Read/Write): Motion Detection (OR condition) or Freefall Detection (AND condition) ........................12
CASE 1: Single Pulse Motion Detection: X or Y or Z > Pulse Threshold for Time < Pulse Duration ..........................12
CASE 2: Freefall Detection: X and Y and Z < Pulse Threshold for Time > Latency Time ...........................................13
CASE 3: Double Pulse Detection: X OR Y OR Z > Threshold for Pulse Duration1 < PDTime1, Latency Time, .........14
Clearing the Interrupt Pins: Register $17 .....................................................................................................................15
Detecting Interrupts ......................................................................................................................................................16
I
SPI Slave Interface ......................................................................................................................................................18
Pin Descriptions ...........................................................................................................................................................19
Recommended PCB Layout for Interfacing Accelerometer to Microcontroller .............................................................19
2
C Slave Interface .......................................................................................................................................................16
MMA7455L
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