Freescale Semiconductor Xtrinsic Accelerometer MMA845xQ Family RDMMA845X RDMMA845X 信息指南
产品代码
RDMMA845X
Scalable Intelligence in Motion
Freescale’s Xtrinsic accelerometer MMA845xQ
family offers extremely low power and pin
compatibility with a broad range of resolution
(14-, 12- and 10-bit) and embedded features
for configurable, accurate motion analysis.
To operate with extremely low power, the
MMA845xQ accelerometers have six user-
configurable sample rates that can be set over
a wide range of 1.5 to 800 Hz. The power
scheme contains four different power modes
from high resolution to low power, offering
best-in-class savings in supply current and
extremely high resolution for very small
motion detection.
family offers extremely low power and pin
compatibility with a broad range of resolution
(14-, 12- and 10-bit) and embedded features
for configurable, accurate motion analysis.
To operate with extremely low power, the
MMA845xQ accelerometers have six user-
configurable sample rates that can be set over
a wide range of 1.5 to 800 Hz. The power
scheme contains four different power modes
from high resolution to low power, offering
best-in-class savings in supply current and
extremely high resolution for very small
motion detection.
Pin to pin compatibility with register map
alignment maximizes hardware re-use between
10-bit and 14-bit designs where there is zero
development cost to migrate from 10-bit
to 14-bit performance. The MMA845xQ
accelerometers are feature-rich with a wide
range of real-time motion detection such
as orientation, directional shake and tap,
jolt, freefall and pedometer applications.
The MMA8451Q contains the 14/8-bit FIFO
which holds up to 32 samples of either low
pass filtered (LPF) or high pass filtered (HPF)
data, depending on user selection. See the
MMA845xQ accelerometer family comparison
table for more details.
alignment maximizes hardware re-use between
10-bit and 14-bit designs where there is zero
development cost to migrate from 10-bit
to 14-bit performance. The MMA845xQ
accelerometers are feature-rich with a wide
range of real-time motion detection such
as orientation, directional shake and tap,
jolt, freefall and pedometer applications.
The MMA8451Q contains the 14/8-bit FIFO
which holds up to 32 samples of either low
pass filtered (LPF) or high pass filtered (HPF)
data, depending on user selection. See the
MMA845xQ accelerometer family comparison
table for more details.
MMA8451Q Block Diagram
X-axis
Transducer
Y-axis
Transducer
Z-axis
Transducer
C to V
Converter
Configurable Embedded DSP Functions
SDA
INT1
INT2
INT2
SCL
32 Data Point
Configurable
FIFO Buffer
with Watermark
Freefall and
Motion
Detection
Transient
Detection
(i.e., fast
motion, jolt)
Shake
Detection
through Motion
Threshold
Single, Double
and Directional
Tap Detection
Enhanced
Orientation with
Hysteresis
and Z-Lockout
Vdd
VddIO
VSS
Auto-Wake/Auto-Sleep Configurable with debounce counter and multiple motion interrupts for control
I
2
C
Auto-WAKE/SLEEP
ACTIVE Mode
WAKE
ACTIVE Mode
SLEEP
MODE Options
Low Power
Low Noise + Power
High Resolution
Normal
Low Noise + Power
High Resolution
Normal
MODE Options
Low Power
Low Noise + Power
High Resolution
Normal
Low Noise + Power
High Resolution
Normal
14-bit
ADC
Clock
GEN
Internal
OSC
Embedded
DSP
Functions
Xtrinsic Accelerometers
Xtrinsic Accelerometer MMA845xQ Family
Pin-compatible 14-, 12- and 10-bit accelerometers
Xtrinsic
The Xtrinsic accelerometer
MMA845xQ family is hardware
and software compatible.
MMA845xQ family is hardware
and software compatible.