Digilent 410-215P Bedienungsanleitung PDF herunterladen

™

Revision: August 3, 2011

Note: This document applies to Rev. A of the board.

1300 NE Henley Court, Suite 3

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Doc: 502-215 page 1 of 2

Overview

The PmodGYRO is a peripheral module

featuring the STMicroelectronics® L3G4200D

MEMS motion sensor. The L3G4200D

provides a three-axis digital output gyroscope

with built in temperature sensor.

Features include:

• Standard SPI and I

C™ interface

• 250/500/2000dps Selectable

Resolutions

• Two customizable interrupt pins

• Power-down and Sleep Mode

• User configurable signal filtering

Functional Description

The PmodGYRO uses a standard 12-pin

connection and communicates via SPI or I

defaulting to I

C communication. A pull-up

resistor on the CS line keeps the device in I

mode unless the CS line is driven low by the

master device

Interface

When communicating with the device the

master must provide a register address and a

flag specifying whether the subsequent action

is a read or write. The actual transfer of data

follows this command. Through this method,

the user can either configure the device by

writing to specific control registers within the

device, or read back data from separate read-

only registers.

Two interrupts directly map to pins available to

the user on connector J1 of the PmodGYRO.

The configuration of INT1, present on pin 7 of

J1, is entirely user customizable. The main use

of INT1 stems from high and low events on the

three axes about which the gyroscope

measures angular speed. By default, the INT1

is disabled. The second interrupt, INT2, is

primarily used for data ready and FIFO

interrupts and maps to pin 8 on J1.

For more information about the control

registers, data collection, and interrupt settings

available for user configuration, see the data

sheet for the L3G4200D on the

STMicroelectronics® website.

SPI Communication

The SPI interface uses three or four signal

lines for communication depending on the

current configuration of the device. These are

Chip Select (CS), Serial Data In (SDI) or

simply Serial Data (SDA) in 3-wire SPI mode,

Serial Data Out (SDO), and Serial Clock

(SCL). The PmodGYRO defaults to the 4-wire

operating mode. In order to use the 3-wire

mode, a control register must be written to. For

more detailed SPI communication, refer to the

device data sheet.

1 2

Inhaltsverzeichnis

Seite 1 - Functional Description

PPmmooddGGYYRROO™™ RReeffeerreennccee MMaannuuaall Revision: August 3, 2011 Note: This document applies to Rev. A of the board. 1300 NE Henley Cour

Seite 2 - PmodGYRO™ Reference Manual

PmodGYRO™ Reference Manual ® www.digilentinc.com www.digilentinc.com Copyright Digilent, Inc. page 2 of 2 I2C Communication The I2C standa

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