JS202011SCQN datasheet(23/45 Pages) MICROCHIP

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Software GUI Description

 2017 Microchip Technology Inc.

DS50002673A-page 23

3.4

SAMPLE RATE AND DISPLAY CONTROLS

Figure 3-8 shows the Sample Rate window, located to the right of the Alert window.

FIGURE 3-8:

SAMPLE RATE WINDOW

Clicking the value for the Rate (Samples/s) option (1) opens the drop-down menu with

the available programmable sample rates for the PAC1934, shown in Figure 3-9.

Sleep mode and One Shot mode are two of the options that can be selected. In One

Shot mode, a new round of results are collected when a refresh command is sent with

the Refresh button right above the Sample Rate window.

FIGURE 3-9:

SAMPLE RATE WINDOW - DROP-DOWN MENU

As seen in Figure 3-8, different values can also be entered for Refresh Period (2) and

Time to Show (3). Refresh Period determines how often the GUI reads the results from

the PAC1934. This is limited to 50 ms maximum by the ADM00805 Evaluation Board

hardware, not the PAC1934. The GUI performs the reading by sending a REFESH_V

command to the PAC1934 and then reads all of the results registers.

Time to Show determines the time span shown on the X axis for the plots. After chang-

ing the Refresh Period of Time to show values, click the Set button to ensure that the

new values take effect. When new values are typed in, they are displayed in red. When

the Set button is clicked, the new values change to black.

The two radio buttons (4) at the bottom of the window control the format for the dis-

played data for both the large Raw Data screen and for the log file. The options show

results in one of two ways:

• Calculated Values, which takes the Sense Resistor and full scale range values

into account for calculating current, voltage and power;

• Register Values, which shows the actual values in the registers, converted to decimal.

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