MAX5423 MAXIM [Maxim Integrated Products], MAX5423 Datasheet - Page 4

• Manufacturer Part Number: MAX5423
• Description: Evaluation Kit
• Manufacturer: MAXIM [Maxim Integrated Products]

MAX5422 Evaluation Kit
The MAX5422 EV kit software GUI shown in Figure 1 is
a Windows program that provides a convenient means
to control the MAX5422. Use the mouse or press the
tab key to navigate through the GUI controls. The cor-
rect SPI write operation is generated to update the
MAX5422 internal memory registers when any of these
controls are executed.
Figure 1. MAX5422 Evaluation Kit Software Main Window
Figure 2. MAX5422 Evaluation Kit Interface Circuit Popup Window
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Detailed Description of Software
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Graphic User Interface (GUI) Panel
The software divides EV kit functions into logical blocks.
The Interface group box indicates the EV kit Status
and the last write operation Command Sent and Data
Sent indicators. This data is used to confirm proper
device operation. The Potentiometer Control group
box changes the wiper position, stores the wiper posi-
tion from the volatile memory to the nonvolatile memory,
and recalls the wiper position from the nonvolatile mem-
ory to the volatile memory. The bottom status bar of
the main window provides the USB interface circuit
communication status. The Factory Default button pro-
grams the volatile and nonvolatile memory of the poten-
tiometer to midscale position.
Upon startup, the MAX5422 EV kit software automati-
cally searches for the USB interface circuit connection.
The MAX5422 EV kit enters the normal operating mode
when the USB connection is detected. The nonvolatile
memory wiper position is then transferred to the volatile
memory. Since the MAX5422 does not have read capa-
bility, all the spin boxes are set to question marks “??”
and the track bar is set to midscale. If the USB connec-
tion is not detected, the software prompts the user to
retry, exit the program, or enter the demo mode.
The MAX5422 EV kit software enters the demo mode,
when the USB connection is not detected, by selecting
Cancel on the MAX5422 Evaluation Kit Interface
Circuit popup window (Figure 2). The software can also
enter demo mode at any time by selecting Options |
Demo Mode from the menu bar in the main window.
When in demo mode, all software communication to the
EV kit circuit is disabled; however, most of the software
GUI is functional. Demo mode allows the user to evaluate
the software without hardware connectivity. To exit demo
mode, select Options | Demo Mode from the menu bar.
Software Startup
Demo Mode