CDB42L55【PDF 1/36 页】BOARD EVAL FOR CS42L55 CODEC

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CDB42L55

Evaluation Board for CS42L55

Features

Line-level Analog Inputs

– 4 RCA Input Jacks

Line-Level & HP Analog Output

– Stereo Headphone Out Jack

– RCA Audio Jacks for Headphone and Line

Outputs

S/PDIF Interface

– CS8416 Digital Audio Receiver

– CS8406 Digital Audio Transmitter

I/O Stake Headers and SMA Connectors

– External I2C ? Control Port Accessibility

– External DSP Serial Audio I/O Accessibility

– Direct DSP Serial Audio I/O accessibility

with CS42L55 through SMA connectors

Multiple Power Supply options via USB, Battery

or External Power Supplies

1.65 V to 3.3 V Logic Interface

FlexGUI S/W Control - Windows ? Compatible

– Pre-defined & User-configurable Scripts

Description

The CDB42L55 is the ideal evaluation platform solution to test

and evaluate the CS42L55.The CS42L55 is a highly integrat-

ed, 24-bit, ultra-low-power stereo CODEC based on multi-bit

Delta-Sigma modulation suitable for low-power portable sys-

tem applications. Use of the board requires an analog or digi-

tal signal source, an analyzer, and power supplies. A

Windows PC-compatible computer is also needed in order to

configure the CS42L55 and the board.

System timing can be provided by the CS8416 S/PDIF Re-

ceiver, by the CS42L55 supplied with a master clock, or via an

I/O stake header with a DSP connected.

RCA connectors are provided for CS42L55 analog inputs and

HP/Line outputs. A 1/8 inch audio jack is provided for head-

phone stereo out. Digital I/O connections are available via

RCA phono or optical connectors to the CS8416 and CS8406

(S/PDIF Rx and Tx).

The CDB42L55 is programmed via the PC’s USB using Cirrus

Logic’s Microsoft ? Windows ? -based FlexGUI software. The

evaluation board may also be configured to accept external

timing and data signals for operation in a user application dur-

ing system development.

Ordering Information

CDB42L55

Evaluation Board

PC Control

Board Power

External 5.0 V

CODEC Power

Serial

Supply

LDO

3.3 V

LDO’s 1.8 V

2.5 V

3.3 V (VL only)

VL, VCP, VLDO, VA

MUX

1.8 V

Buck

AAA Alkaline

(not included)

USB

I2C for all

applicable

devices

24 MHz

Oscillator

Circuit Break for

Stereo

PLL

External System

Input 1

S/PDIF Rx

FPGA

Clock/Data Routing

Clock dividers and PLL used

Interface

PCM

Clocks/Data

CS42L55

Stereo

Input 2

to derive all applicable Fs

S/PDIF Tx

from 24 MHz oscillator

Tri-state

I2C Clocks/

Data

Buffers

SRC (Tx)

I/O Stake Headers for Audio

Precision’s Programmable Serial

SRC (Rx)

I/O SMA Connectors

for External System

Interface

Jack

Stereo HP

Output

Stereo Line

Output

Interface Adapter (PSIA)

http://www.cirrus.com

DEC '08

DS773DB1

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