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MAX5868EVKIT Datasheet(PDF) 21 Page - Maxim Integrated Products

Part No. MAX5868EVKIT
Description  Evaluates the MAX5868 RF DAC Performance, Evaluates the MAX5868 RF DAC Performance,
Download  55 Pages
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
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MAX5868EVKIT Datasheet(HTML) 21 Page - Maxim Integrated Products

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Evaluates: MAX5868
MAX5868 Evaluation Kit
Temperature
The
Temperature block displays the MAX5868 DAC
temperature on request. To read the temperature from
the MAX6654 through the I2C interface, click on the
Read Temperature button. If the user would like a visual
indicator of an overtemperature fault (ALERT), enter the
threshold temperature into the text box and click the
Set
Threshold button. This will cause the MAX6654 to set
(active-low) the ALERT output pin when the threshold
temperature is exceeded. This will light the red, D1 LED
on the MAX5868 EV kit board as a visual warning. This is
a latched output so the alert needs to be cleared manually
with the GUI software. To clear the temperature fault, click
on the
Clear Temperature Alert button.
Device Status
The
Device Status block shows various operating states
of the MAX5868. To update the device status, click on
the
Get Status button. The GUI software will read out
the flag bits/registers of the MAX5868. These are all
displayed in the easy-to-read Device Status panel. If
the user wishes to check the individual status bits, the
Register Access Tab section describes how to interface
directly with the MAX5868’s internal registers.
Automation Options
The Automation block contains the
Enable TCP/IP
Control switch and a text box for entering a port number.
This utility feature allows the user to run many of the GUI-
based operations without the actual GUI. This TCP/IP
command option turns the MAX5868 evaluation system
into a valuable tool for automated evaluation or charac-
terization of different DAC configurations typically used in
automated bench testing.
See Appendix II for a list of supported TCP/IP, remote-
control commands.
Register Access Tab
The
Register Access tab (Figure 19) provides the
controls needed to write and/or read individual registers
in the MAX5868. Read, Write, or Register Description
options are provided for the transaction.
The following process shows the steps required to access
the MAX5868 registers.
1) Select the text box next to the
Register 0x label
a) Enter the address of the register to access. The
register address must be a hexadecimal number
(“0x” prefix is not necessary).
2) In the
Select Command section, choose a radio
button to
Read, Write or get Description of the
previously selected register.
3) In the
Select Data section, if Write was selected
then enter the intended value in this text box as a
hexadecimal number (“0x” prefix is not necessary)
4) In the
Execute Command section, after the de-
sired
write command has been assembled, the user
simply clicks on the
Execute button to write the
information to the selected register
5) In the
Results section, the GUI will provide any feed-
back received from the MAX5868 through the FPGA
interface. If only a
write operation was executed, a
read-back will be reflected in this text box. If a
read
operation was executed then the value is displayed
in this text box. Also note that the command that was
written and the resultant read-back will be logged in
the
Results Log text in the lower portion of the GUI
window.


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