Digilent 410-255P-KIT User Manual
Digilent Hardware
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Revision: November 9, 2012
Note: This document applies to REV A of the board
1300 Henley Court | Pullman, WA 99163
(509) 334 6306 Voice and Fax
Doc: 502-255
page 1 of 1
Copyright Digilent, Inc. All rights reserved. Other product and company names mentioned may be trademarks of their respective owners.
Overview
The PmodACL2 is a 3-axis digital
accelerometer module powered by the Analog
Devices ADXL362.
Features include:
•
user-selectable resolution
•
single or double-tap detection
•
activity and inactivity monitoring
•
free fall detection
•
SPI Communication
Functional Description
The PmodACL2 uses a standard 12-pin
connector and can communicate via SPI.
While the ADXL362 is in Measurement Mode,
it continuously measures and stores
acceleration data in the X-data, Y-data, and Z-
data registers.
Do not exceed 3.3V on the VCC power supply.
Exceeding this limit could permanently damage
the ADXL362.
Interface
All communications with the device must
specify a register address and a flag that
indicate whether the communication is a read
or a write. Actual data transfer always follows
the register address and communication flag.
Perform device configuration by writing to the
control registers within the accelerometer.
Access accelerometer data by reading the
device registers.
You may find a full list of registers, their
functionality, and communication specifications
in the ADXL362 datasheet available at:
www.analog.com
.
Table 1. Interface Connector Signal
Description
The SPI standard uses four signal lines. These
are slave select (~SS), master out slave in
(MOSI), master in slave out (MISO), and serial
clock (SCLK). These four signal lines map to
the following signals on the ADXL345: ~SS
corresponds to the chip select signal
(~CS),
MOSI corresponds to serial data input (SDI),
MISO corresponds to serial data output (SDO),
and SCK corresponds to the serial clock
(SCLK). (See Table 1 for signal descriptions.)
Connector J1 – SPI Communications
Pin Signal
Description
1
~SS
Slave select
2
MOSI
SPI master out slave in data
3
MISO
SPI master in slave out data
4
SCLK
Serial clock
5
GND
Power supply ground
6
VCC
Power supply (3.3V)
7
INT2
Interrupt two
8
INT1
Interrupt one
9
NC
Not connected
10
NC
Not connected
11
GND
Power supply ground
12
VCC
Power supply (3.3V)