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PAC1934 Evaluation Board (ADM00805) User’s Guide

DS50002673A-page 20

 2017 Microchip Technology Inc.

3.2

TOP MENU

As seen in Figure 3-1, the Device window (1) shows the device on the board and its

I2C address; some parts have a serial number that is displayed.

When clicked, the Settings button (3) displays a drop-down menu with two options: Set

Constants and Slow Register, as shown in Figure 3-3.

Note that you need to stop the acquisition process in order to have access to the Slow

the values in the Set Constants Menu. Any changes to these values do not take effect

until the start of the acquisition.

FIGURE 3-3:

SETTINGS DROP-DOWN MENU

The Set Constants option opens the Sense Resistor Values dialog box when clicked,

displayed in Figure 3-4. The default values shown are the sense resistor values in

DEMO mode. Enter a new value in ohms if the SYSTEM/SHUNT mode is used or if a

different value of sense resistor is used (see Section 3.3 “PAC Settings section”).

FIGURE 3-4:

SENSE RESISTOR VALUES DIALOG BOX

Selecting the Slow Register option opens the Refresh Commands dialog box, displayed in

Figure 3-5, which allows the user to select which type of refresh commands, if any, occur

on the rising and falling edge of the SLOW pin transitions. Select the desired options and

the GUI programs the Slow Register (0x20) in the PAC1934 appropriately (see the

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