CX20921 AudioSmart Data Sheet

Table of Contents

Conexant Confidential

03/11/15

001DSR01

iii

Table of Contents

General Description.......................................................................................................................................................i

Applications ...................................................................................................................................................................i

Features..........................................................................................................................................................................i

Revision History ...........................................................................................................................................................ii

Introduction...................................................................................................................................................................1

Overview............................................................................................................................................................................... 1

Features................................................................................................................................................................................ 2

Cores .......................................................................................................................................................................... 2

On-Chip Memory ........................................................................................................................................................ 2

Voice CODEC............................................................................................................................................................. 2

Interfaces .................................................................................................................................................................... 3

Clocks ......................................................................................................................................................................... 3

Power Management.................................................................................................................................................... 4

External Memory Interface Support ............................................................................................................................ 4

Boot Device ................................................................................................................................................................ 4

Footprint...................................................................................................................................................................... 4

DSP Algorithms .......................................................................................................................................................... 4

Firmware and Software............................................................................................................................................... 4

Hardware Interface .......................................................................................................................................................5

Block Diagram...................................................................................................................................................................... 5

Pin Information .................................................................................................................................................................... 6

Pin Configuration ........................................................................................................................................................ 6

Pin Signal Definitions.................................................................................................................................................. 7

Electrical Characteristics...........................................................................................................................................10

Recommended Operating Conditions ............................................................................................................................. 10

Digital Inputs and Outputs................................................................................................................................................ 11

Power Consumption.......................................................................................................................................................... 12

Interfaces.....................................................................................................................................................................13

Universal Serial Bus (USB) 2.0 ......................................................................................................................................... 13

General Purpose Input/Output (GPIO) ............................................................................................................................. 13

Direct Current-to-Direct Current (DC-DC) Converter—Internal 1V................................................................................ 14

Reset (Active Low)............................................................................................................................................................. 15