Detailed Description of Software

User-Interface Panel

The user interface (Figure 1) is easy to operate: use the

mouse, or a combination of the tab and arrow keys to

manipulate the software. Each of the buttons corre-

sponds to bits in the command and configuration

bytes. By clicking on them, the correct SPI write opera-

tion is generated to update the internal registers of the

MAX19700. Note: Words in bold represent visible items

on the graphical user interface (GUI).

The software divides EV kit functions into logical

blocks. The Interface box indicates the current Device,

the

Register

Address

Sent,

and

the

Data

Sent/Received for the last write operation. This data is

used to confirm proper device operation. Adjust the

SPI Clock Frequency through the pulldown box.

The controls for the Tx DAC and Auxiliary DACs are

accessed through tab sheets. Device Control is

accessed at the right-hand side of the main window.

Return the EV kit to its power-on-reset state by clicking

the POR Reset button.

The MAX19700 EV kit software features additional func-

tions to simplify operation. Automatic Diagnostics

probes the command module board to make sure that

a connection exists between the PC and the command

module.

Device Control

Configure the operating mode of the device through the

intuitive controls in the Device Control box. Select a

mode as outlined in the MAX19700 data sheet using

the Operating Mode control. For a detailed description

of the MAX19700 operating modes and their specific

names, refer to the Power-Management Modes table in

the MAX19700 data sheet.

When using SPI Tx/Rx Control, ensure that jumper

JU3 is set appropriately. See the Digital Data Direction

section in this document for details regarding JU3.

Tx DAC Controls

Adjust the Common-Mode Voltage and the DAC Full-

Scale voltage by selecting the desired option from the

pulldown box.

The DAC I-Offset and Q-Offset voltages can be adjust-

ed in 801.5µV/977.5µV increments by adjusting the

appropriate slider in the Tx DAC Offset Control box.

The increment value is dependent on the DAC Full-

977.5µV increment. Alternatively, a number (specified

in millivolts) can be entered in the boxes below each

slider. If a number not divisible by 0.8015/0.9775 is

entered, the software automatically rounds the number

to the nearest 801.5µV/977.5µV increment and sends

the appropriate data to the MAX19700.

MAX19700 Evaluation Kit/Evaluation System

6

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Figure 1. MAX19700 EV Kit Software Main Window

Figure 2. MAX19700 EV Kit Software Auxiliary DAC Control