EVAL-ADV7194EB Ver la hoja de datos (PDF) - Analog Devices

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EVAL-ADV7194EB

Evaluation Board for the ADV7194 Digital Video Encoder

Analog Devices 

EVALUATION SOFTWARE

In order to give the user complete control over

the ADV7194, a computer program is supplied

with the board.

Setting Up:

Insert DISK 1 into the floppy drive and double

click on “SETUP.EXE” and you will be

prompted for all other necessary information.

Running the Software:

Double clicking the ADV7194 icon will run the

software for the evaluation board.

Initialisation:

After starting the software you will be

asked to load a preset.

If you are not familiar with the software

it is recommended to o.k. this message.

You will have the ADV7194 immediately

configured in such a way that it will output

a color bar signal when the DAC A BNC

output is connected to a NTSC monitor.

For this configuration it is not necessary

to provide an input signal because the internal

color bars are enabled. The register settings

for this preset can be checked in clicking

on the READ ALL REGISTERS in the

main window.

Otherwise it is recommended to consult the

datasheet for information about each control.

Eval-ADV7194EB

IMPORTANT THINGS TO KNOW:

Validity of Settings:

The evaluation software can automatically check

for an acknowledge or, when any register is

changed can automatically read-back the new

value stored in that register. The “ACKcheck”

function is in the “Options” menu. The “Continu-

ous Read” function may be enabled in the

“Register Access” menu.

I2C Compatible Programming:

This version of software does not take into

account the ability of the ADV7194 to accept

continuous streams of data. Instead, for every

register write or read, it completely re-initiates a

start sequence (see the ADV7194 Data sheet for

information on different ways registers can be

written to). This means that more information has

to be written to the MPU port extending the time

required to program the ADV7194.This, while

being a valid way of writing to the ADV7194 is

not the optimum method of writing to the

ADV7194.

Dynamically Linked Menu System:

All menues in this software are interactive, so

when (for example) you change the value of a

register all switch settings relevant to that register

change will automatically change to the correct

state, the inverse is also correct.

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