MMA7455 Parallax, Inc., MMA7455 Datasheet - Page 6

• Manufacturer Part Number: MMA7455
• Description: Mma7455 3-axis Accelerometer Module
• Manufacturer: Parallax, Inc.

Module Dimensions
See PDF attached.
Copyright © Parallax Inc.
2. Power on the device and initialize the “Mode Control” register ($16 MCTL). For example: writing
3. The device is ready to be read by the microcontroller. Be sure to read from the correct data
a value of $25 (%00100101) configures the device for SPI 3-wire mode, ±2g measurement
range, and puts the device in measurement mode rather than its default standby mode. Refer to
the MMA7455L device datasheet for information on proper SPI or I
send and receive data.
registers depending on whether 8-bit (±2g, ±4g, ±8g) or 10-bit (±8g) data is used.
example: reading the XOUT8 ($06) data register returns the 8-bit value for acceleration along
the x-axis.
operation can be performed in a continuous loop in software, or intermittently when required by
the application.
Continue reading data from any other desired axes (YOUT8, or ZOUT8).
MMA7455 3-Axis Accelerometer Module (#28526)
2
C communication protocol to
v1.1 9/24/2009 Page 6 of 6
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