CDB8416 datasheet(4/28 Pages) CIRRUS

Teilenummer	CDB8416

Bauteilbeschribung	Evaluation Board

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Hersteller	CIRRUS [Cirrus Logic]

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CDB8416

4

DS578DB2

1. OVERVIEW

The CDB84166 evaluation board contains a

CS8416 and a CS8406 and the supporting circuitry

necessary to operate them. The board provides bal-

anced XLR and unbalanced optical and coaxial in-

puts and outputs as outlined in the AES3 and

IEC60958 standards. In Software Mode, the con-

trol registers of the CS8416 and CS8406 are set by

a Windows based program through the parallel port

of a PC.

1.1

CS8416 and CS8406

The features and functions of the CS8416 and the

CS8406 are described in their respective data

sheets.

1.2

Parallel Port

To use the CS8416 and CS8406 on the board in

Software Mode, the parallel port on the upper right

hand side of the board should be connected to the

parallel port of the PC running the CDB8416 con-

trol software.

1.3

Serial Digital Audio Inputs

The left edge of the board is occupied by a row of

serial digital audio input connectors. In either

Hardware or Software Mode the user must select

which inputs are to be used via the switch setting,

INPUT, on switch S3.

Set the switch to the open position to select the

XLR balanced input which will use the RXP1 and

RXN inputs of the CS8416.

Set the switch to the closed position to select the

optical/coaxial unbalanced inputs which will use

the RXP0 and RXP2 through RXP7 inputs of the

CS8416. This will AC couple the RXN input to

GND. Note that in Hardware Mode, only RXP0

through RXP3 on the CS8416 are available for use.

To select between the inputs in Hardware Mode,

use the RXSEL0 and RXSEL1 switches on S3.

1.4

Serial Digital Audio Outputs

The right edge of the board is occupied by the serial

digital audio outputs. The optical S/PDIF output is

always enabled. The user may also choose to en-

able either the coaxial S/PDIF output or the XLR

AES3 output via jumper J11. These outputs are

transformer coupled.

1.5

Three Wire (PCM) Serial Audio

Input and Output

Header J18 is provided so the user may access the

three wire serial audio ports of the receiver and

transmitter. The purpose of this port is to allow the

user to connect external circuitry such as a DAC,

ADC, or DSP to the receiver and transmitter. Sig-

nals going into or out of these headers should be

operated at VL+.

Setting switch S1-M/S in the open position sets the

CS8416 as the master and the CS8406 as slave for

LRCK and SCLK. Setting switch S1-M/S in the

closed position sets the CS8406 as the master and

the CS8416 as slave for LRCK and SCLK.

Setting switch S3-8416_PCM to the open position

will turn off all of the input/output buffers for the

CS8416. Setting switch S4-8406_PCM to the open

position will turn off all of the input/output buffers

for the CS8406. These switches allow the user to

independently set the input and output for the

CS8416 and CS8406.

1.6

Crystal Oscillators

Oscillator Y1 provides the System Clock (OMCK)

for the CS8416. The crystal oscillator on the board

is mounted in pin sockets that allow it to be re-

moved or replaced. The board is shipped with a

12.288 MHz crystal oscillator stuffed at Y1, setting

the output sampling rate to 48 kHz. Please refer to

the CS8416 data sheet for details on OMCK opera-

tion.

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