NXP Semiconductors
Data Sheet: Technical Data
Document Number: MMA9555L
Rev. 2.3, 8/2016
MMA9555L Intelligent Motion-
Sensing Pedometer
MMA9555L
The MMA9555L intelligent motion-sensing pedometer is an extension of the
MMA955xL intelligent sensor platform. This device incorporates a 3-axis
MEMS accelerometer, signal conditioning, data conversion, and a 32-bit
microcontroller. This intelligent motion-sensing sensor provides sophisticated
pedometer functionality, activity level and six directional orientation monitoring.
The integrated functionality of sensor initialization, calibration, data
compensation, and computation functions off-loads CPU bandwidth from the
system application processor. Therefore, total system power consumption is
significantly reduced, because the application processor stays powered down
until absolutely needed. In addition, the device can be configured for an
autosleep/autowake capability.
MMA9555L is available in a plastic LGA package; the device is guaranteed to
operate over the extended temperature range of –40 °C to +85 °C.
16-pin LGA
3 mm x 3 mm x 1 mm
Case 2094-01
Features
•
High resolution 3-axis accelerometer with
16-bit ADC (0.061 mg/LSB @ 2 g)
Top view
•
•
Selectable g range (±2/4/8 g) and output data rates (488 Hz–3.8 Hz)
One slave SPI or I2C interface operating at up to 2 Mbps for communication
with the host processor
•
1.8 V supply voltage low power consumption
• 2 µA typical current at stop mode
16 15 14
V
1
2
3
4
5
13 RGPIO7 / AN1
DD
• 117 µA for pedometer running at active and 92 µA at suspend
• 87 µA when six-direction detection mode
BKGD-MS /
RGPIO9
12
11
10
9
RGPIO6 / AN0
RGPIO5 /
PDB_A / INT_O
•
Complete built-in firmware for smart sensing intelligence
• Real time and preemptive application task scheduling
• Command interpreter support command/response and streaming
mode
RESETB
SCL0 / RGPIO0 /
SCLK
V
SS
RGPIO4/INT
V
SS
6
7
8
• Low-power pedometer with rich output information
– Step counting
– Speed, distance, calorie count estimation
– Activity level (rest, walking, jogging, running)
• Six-direction detection output
• Extensive set of power-management features and low-power
mode
Pin Connections
• GPIO2–GPIO8 can be used for expanded configurable GPIO
functions
•
Minimal external component requirements
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2016. All rights reserved.