AD8152 datasheet(24/32 Pages) AD

24 / 32 page

REV. A

–24–

AD8152

EVALUATION BOARD CONTROL SOFTWARE

The AD8152 evaluation board can be controlled by using a PC

and a custom software program. The hardware interface uses a

PC parallel (or printer) port. A standard printer cable is used to

connect from the PC DB-25 connector to the Centronics-type

connector on the evaluation board. Figure 17 shows an evaluation

board control panel from a PC display.

A single screen allows control of all the programmable functions

of the AD8152. The programming modes are listed in the Mode

box. Select either I/O Programming or Current Programming by

selecting the appropriate radio button. These will allow either

programming the switch matrix or the output currents one at a time.

An alternative is to use the Broadcast mode. This will either

simultaneously program all of the outputs to one selected input

or program all outputs to the same current.

Figure 17. Evaluation Board Control Panel

In the I/O Programming mode (nonbroadcast), the desired input

is selected from the Input Select box by double-clicking on the

appropriate input channel number. This will cause the same

channel to appear in the Active Input Selection indicator window.

Next, select the desired output from the Output Select box by double-

clicking the appropriate output channel number.

Finally, the Program button is clicked and the data is immediately

sent to the evaluation board for programming the part to the

selected I/O combination.

If an additional output(s) is desired to be programmed to the same

input, double-click the desired output channel number and click

the Program button.

The Programmed Output table indicates which outputs are

programmed to the input that is indicated in the Active Input

Selection window. If it is desired to disable an individual output,

its radio button in the Programmed Output table can be clicked,

and it will change from black to white to indicate that it is not

enabled. Note: It is not possible to program outputs by selecting

their radio buttons.

To observe the set of outputs that are connected to any input,

double-click the desired input channel number from the Input

Select box. The selected channel number will show up in the Active

Input Selection window and the programmed outputs will have a

black dot in their radio button in the Programmed Output table.

To program an output current, select the Current Programming

button in the Mode box. Then double-click the desired output

channel number from the Output Select table. Next double-click

the desired entry for the Output Current. Finally, click the

Program button.

If the Broadcast button is selected from the Mode box, all outputs

will be treated the same. If I/O Programming is selected, double-

click the input channel number from the Input Select table

and click the Program button. This will cause all outputs to be

programmed to the selected output, and all of the buttons will

have a black dot in the Programmed Output table.

For broadcast current programming, double-click the desired

Output Current. Then click the Program button. All of the outputs

will be programmed to the selected output current.

The Reset button will disable all outputs. In addition, all output

currents will be programmed to the nominal value of 16 mA.

AD8152 Datasheet(PDF) 24 Page - Analog Devices

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