MMA7456L Просмотр технического описания (PDF) - NXP Semiconductors.

Номер в каталоге

Компоненты Описание

Список матч

MMA7456L

±2g/±4g/±8g Three Axis Low-g Digital Output Accelerometer

NXP Semiconductors. 

Contents

ELECTRO STATIC DISCHARGE (ESD) ......................................................................................................................................6

PRINCIPLE OF OPERATION ......................................................................................................................................................8

FEATURES ..................................................................................................................................................................................9

Self-Test .........................................................................................................................................................................9

g-Select ..........................................................................................................................................................................9

Standby Mode ................................................................................................................................................................9

Measurement Mode .......................................................................................................................................................9

Level Detection ...........................................................................................................................................................................10

$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

Threshold Detection for Motion and Freefall Conditions ............................................................................................................11

CASE 1: Motion Detection ...........................................................................................................................................11

CASE 2: Motion Detection ...........................................................................................................................................11

CASE 3: Freefall Detection ..........................................................................................................................................11

CASE 4: Freefall Detection ..........................................................................................................................................11

Pulse Detection ..........................................................................................................................................................................12

$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 ...................................14

Assigning, Clearing & Detecting Interrupts .................................................................................................................................15

Clearing the Interrupt Pins: Register $17 .....................................................................................................................15

Detecting Interrupts ......................................................................................................................................................16

Digital Interface ...........................................................................................................................................................................16

I2C Slave Interface .......................................................................................................................................................16

SPI Slave Interface ......................................................................................................................................................18

BASIC CONNECTIONS .............................................................................................................................................................19

Pin Descriptions ...........................................................................................................................................................19

Recommended PCB Layout for Interfacing Accelerometer to Microcontroller .............................................................19

Register Definitions ....................................................................................................................................................................21

Soldering and Mounting Guidelines for the LGA Accelerometer Sensor to a PC Board ............................................................29

Sensors

Freescale Semiconductor

MMA7456L

2

Share Link: