Overview

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 through its inactivity monitoring.

1 Functional Description

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

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

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. An example set of commands to read from the y-

axis register is given below:

configure the FIFO Control register (address 0x28) to indicate that we want the FIFO buffer to store data. After the

ADXL362 has been configured to use the FIFO buffer, a command byte to read from the FIFO buffer (0x0D) must

first be sent, then followed by pairs of data bytes containing which axis is being measured as well as the

acceleration data. An example set of commands to read from the FIFO buffer is given below:

2.1 Pinout Description Table

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.

3 Physical Dimensions

The pins on the pin header are spaced 100 mil apart. The PCB is 0.95 inches long on the sides parallel to the pins on

the pin header and 0.8 inches long on the sides perpendicular to the pin header.