Datasheet

MAX5392 Evaluation System

Evaluates: MAX5387/MAX5392

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Figure 1. MAX5392 Evaluation Kit Software Main Window

Detailed Description of Software

Graphical User Interface (GUI) Panel

The MAX5392 EV kit software GUI shown in Figure 1 is

a Windows program that provides a convenient means

to control two MAX5392M dual potentiometers. Use the

mouse or press the Tab key to navigate through the GUI

controls. The correct SMBus/I

C write operations are

generated to update the MAX5392M internal memory

registers when any of these controls are executed.

The EV kit software GUI features four window tab sheets

to select and control two MAX5392 ICs (U3_MAX5392,

U4_MAX5392), dual on-board digital potentiometers,

and two unpopulated MAX5387 ICs (U1_MAX5387, U2_

MAX5387). The software also provides status indicators

(Status1 and Devices Found) to indicate that the EV kit

is operational and the total number of valid MAX5387

and MAX5392 devices populated on the EV kit, respec-

tively. The DEVICES group box indicates components

U1–U4 current device address and the last write opera-

tion Command Sent and Data Sent indicators.

A few more available software features can be evaluated

by using the menu bar. The software has a demo mode,

which is available by selecting the Options | Demo

Mode menu item. When in demo mode, all software com-

munication to the EV kit hardware is disabled and most

of the software’s GUI is functional. This feature enables

a user to evaluate the software without hardware con-

nectivity.

The EV kit software configures the MINIQUSB+ inter-

face board’s 2-wire communication speed to 400kHz

by default. The speed can be reduced to 100kHz, if

required, by selecting the Options | 2-Wire Speed |

100kHz menu item. This configuration may be required if

slower 2-wire devices are connected to the EV kit’s SCL

and SDA J1 header.