Table Of Contents; Revision History - Analog Devices AN-951 Application Note

AN-951

TABLE OF CONTENTS

Introduction ...................................................................................... 1
Revision History ............................................................................... 2
Hardware Interfacing ....................................................................... 3
Momentary Push-Button Input .................................................. 3
Single-Pole Switch Input .............................................................. 3
Rotary Encoder Input .................................................................. 3
Potentiometer Input ..................................................................... 3
LED Output ................................................................................... 3
Using GPIO in a SigmaStudio Project ........................................... 4
Setting Up GPIO Pins in the SigmaStudio
Register Window .......................................................................... 4
Using the Evaluation Board with the GPIO Board ...................... 7

REVISION HISTORY

9/10-Rev. 0 to Rev. A
Changes to Figure 16 and ADC Section and Figure 18 ............... 6
Changes to Push-Button Volume Control-
Up/Down Mute Section ................................................................... 8
Added GPIO Expansion Board Schematics Section .................. 15
12/08-Revision 0: Initial Version
Example Implementations of GPIO in Software ...........................8
Push-Button Volume Control-Up/Down/Mute .....................8
Rotary Encoder Volume Control ............................................. 10
Push-Button-Controlled Demultiplexer ................................. 11
Push-Button-Controlled Filter ................................................. 12
Auxiliary ADC Volume Control .............................................. 13
Auxiliary ADC Voltage-Controlled Oscillator ....................... 13
Auxiliary ADC Slew Multiplexer ............................................. 14
Blinking LED .............................................................................. 14
GPIO Expansion Board Schematics ............................................ 15
Rev. A | Page 2 of 20
Application Note