CDB5521 datasheet(16/28 Pages) CIRRUS

16 / 28 page

CDB5521/22/23/24/28

DS317DB2

•Acquire Data

This icon begins a conversion cycle based on

the selection of MC, LP, and RC. Depending

on the status of these bits, the software will in-

struct the converter to do single conversions or

collect data in the FIFO, and display the infor-

mation on the screen. Pressing the STOP but-

ton will end the conversion cycle. All other

icons are disabled during the conversion cycles

to avoid hardware conflicts.

•

MC/LP/RC Selection

This box allows the user to select between the

different types of conversion cycles available

by modifying the MC, LP, and RC bits in the

configuration

(refer

the

CS5521/22/23/24/28 data sheet for more infor-

mation).

•

Channel

Selects the Setup that will be accessed for sin-

gle conversions (MC = 0). For MC = 1, this

box is ignored.

•

Data FIFO Boxes

These boxes display the information returned

from the data FIFO buffer when MC = 1. For

MC = 0, the single conversion will be displayed

in box number 1.

•

Channel Data Boxes

When using the CS5521/23, these boxes will

contain the conversion channel information re-

turned with the data word. When using the

CS5522/24/28, these boxes will be inactive.

2.6 Histogram Window Overview

The following is a description of the controls and in-

dicators associated with the Histogram Window

(Figure 11).

Many of the control icons are usable

from the Histogram Window, the Frequency Do-

main Window, and the Time Domain Window. For

brevity, they are only described in this section.

•

Bin

Displays the x-axis value of the cursor on the

Histogram.

•

Cancel

Once selected, it allows a user to exit from the

COLLECT algorithm. If data conversion sam-

ple sets larger than 64 are being collected and

the CANCEL button is selected, it is recom-

mended that the user reset the evaluation board.

The board will eventually recover from the

continuous collection mode, but the recovery

time could be as long as 10 minutes.

•

Channel

Selects the Setup that will be accessed to per-

form conversions when COLLECT is activat-

ed.

•

Collect

Initiates the data conversion collection process.

COLLECT has two modes of operation: collect

from file or collect from converter. To collect

from a file an appropriate file from the SETUP-

DISK menu bar option must be selected. Once

a file is selected, its content is displayed in the

graph. If the user is collecting real-time conver-

sions to analyze, the appropriate COM port

must be selected. The user is then free to collect

the preset number of conversions (preset by the

CONFIG pop-up menu discussed below). No-

tice, there is a significant acquisition time dif-

ference between the two methods.

•

Config

Opens a pop-up panel to configure how much

data is to be collected, and how to process the

data once it is collected. The following are con-

trols and indicators associated with the CON-

FIG panel.

Samples - User selection of 16, 32, 64, 128,

256, 512, 1024, 2048, 4096, or 8192 con-

versions.

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