MMA8451Q(2010) 데이터 시트보기 (PDF) - Freescale Semiconductor
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MMA8451Q Datasheet PDF : 53 Pages
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Application Notes for Reference
The following is a list of Freescale Application Notes written for the MMA8451, 2, 3Q:
• AN4068, Embedded Orientation Detection Using the MMA8451, 2, 3Q
• AN4069, Offset Calibration of the MMA8451, 2, 3Q
• AN4070, Motion and Freefall Detection Using the MMA8451, 2, 3Q
• AN4071, High Pass Data and Functions Using the MMA8451, 2,3Q
• AN4072, MMA8451, 2, 3Q Single/Double and Directional Tap Detection
• AN4073, Using the 32 Sample First In First Out (FIFO) in the MMA8451Q
• AN4074, Auto-Wake/Sleep Using the MMA8451, 2, 3Q
• AN4075, How Many Bits are Enough? The Trade-off Between High Resolution and Low Power Using Oversampling Modes
• AN4076, Data Manipulation and Basic Settings of the MMA8451, 2, 3Q
• AN4077, MMA8451, 2, 3Q Design Checklist and Board Mounting Guidelines
1
Block Diagram and Pin Description
1.1 Block Diagram
VDD
VDDIO
VSS
X-axis
Transducer
Y-axis
Transducer
Z-axis
Transducer
Internal
OSC
Clock
GEN
C to V
Converter
14-bit
ADC
INT1
INT2
Embedded
DSP
I2C
Functions
SDA
SCL
1.2
32 Data Point
Configurable
FIFO Buffer
with Watermark
Freefall
and Motion
Detection
Transient
Detection
(i.e., fast motion,
jolt)
Enhanced
Orientation with
Hysteresis
and Z-lockout
Shake Detection
through
Motion
Threshold
Single, Double
& Directional Tap
Detection
Auto-WAKE/Auto-SLEEP Configurable with debounce counter and multiple motion interrupts for control
MODE Options
Low Power
Low Noise + Power
High Resolution
Normal
ACTIVE Mode
WAKE
Auto-WAKE/SLEEP
Pin Description
Figure 1. Block Diagram
ACTIVE Mode
SLEEP
MODE Options
Low Power
Low Noise + Power
High Resolution
Normal
Z
Earth Gravity
X
1
13
1
Y
9
5
MMA8451Q
6
(TOP VIEW)
DIRECTION OF THE
DETECTABLE ACCELERATIONS
(BOTTOM VIEW)
Figure 2. Direction of the Detectable Accelerations
Sensors
Freescale Semiconductor
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