Datasheet

1300 Henley Court

Pullman, WA 99163

509.334.6306

www.digilentinc.com

PmodACL2™ Reference Manual

Revised May 24, 2016

This manual applies to the PmodACL2 rev. A

DOC#: 502-255

Other product and company names mentioned may be trademarks of their respective owners.

Page 1 of 3

Overview

The PmodACL2 is a 3-axis MEMS accelerometer powered by the Analog Devices ADXL362. By communicating with

the chip via the SPI protocol, users may receive up to 12 bits of resolution for each axis of acceleration.

Additionally, this module offers external trigger sensing through single or double-tap detection as well as power

saving features though its inactivity monitoring.

1 Functional Description

The PmodACL2 utilizes Analog Devices ADXL362 to provide MEMS acceleration data to the system board. With its

deep 512-sample FIFO buffer, users are able to view a long string of events prior to a triggered interrupt or simply

be able to have the system board access acceleration data when the user finds it most convenient.

2 Interfacing with the Pmod

The PmodACL2 communicates with the host board via the SPI protocol. To read from the on-board data registers,

the Chip Select line must first be pulled low and then send a command byte to read from the data registers (0x0B).

The desired address byte must be sent next, and then the desired byte is received with the MSB first on the falling

The PmodACL2.

 3-axis MEMS accelerometer

 Up to 12 bits of resolution per axis

 User-selectable resolution

 Activity/inactivity monitoring

 Low current consumption at <2 μA at 100Hz

 Free-fall detection

 Small PCB size for flexible designs 1.0 in ×

0.8 in (2.5 cm × 2.0 cm)

 Follows Digilent Pmod Interface

Specification Type 2A

 Library and example code available

in resource center

Features include:

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300 Henley Court Pullman, WA 99163 509.334.6306 www.digilentinc.com PmodACL2™ Reference Manual Revised May 24, 2016 This manual applies to the PmodACL2 rev. A Overview The PmodACL2 is a 3-axis MEMS accelerometer powered by the Analog Devices ADXL362. By communicating with the chip via the SPI protocol, users may receive up to 12 bits of resolution for each axis of acceleration.
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PmodACL2™ Reference Manual clock edge. Because the address pointer auto-increments to the next address byte, it is possible to read multiple bytes consecutively by continuing to pulse the Serial Clock line.
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PmodACL2™ Reference Manual The PmodACL2 also has two programmable interrupt pins available for use. Both of these pins can be set to trigger an interrupt upon multiple different triggers including activity/inactivity (to help reduce system power), when the FIFO buffer is filled to a desired level, when data is ready to be retrieved, and other triggers. Any external power applied to the PmodACL2 must be within 1.6V and 3.5V. Consequently, with Digilent system boards, this Pmod must be run off of a 3.3V rail.