NXP Semiconductors NTS0304EUK-ARD, Руководство пользователя, Страница: 24 / 29

NXP Semiconductors
UM11762
NTS0304EUK-ARD evaluation board
Figure 16. Graphical interface – “Dynamic” tab activated
The second tab is DYNAMIC . Clicking on this new tab, a new window appears (see
Figure 16 ).
In the upper side of the window, from Set VCCA and Set VCCB drop-down lists, the
user can select the power supply voltages. For VCCA, one of the four values: 0.95 V
(default value), 1.2 V, 1.8 V, 2.5 V or 3.3 V can be selected. For VCCB the selectable
values are: 1.8 V (default value), 2.5 V, 3.3 V and 4.96V. The Set button sets the power
supply voltages to NTS0304EUK IC (see the red vertical arrow in Figure 16 ). VCCA
must be less or equal to VCCB. Otherwise, a pop-up window appears with the message
“VCCA must be less than or equal to VCCB”
. Click “ OK ” to close the pop-up window. If
the voltages are successfully set, the values are confirmed in the red boxes placed in the
center of the display under LDO.
In the center of the window is sketched a chain of blocks connected with bidirectional
arrows indicating the data flow through the chain.
Set Output Voltage input box: allows the user to set the output voltage. The voltage
should be less than or equal to 2.5 V.
Protocol drop-down list: allows the user to select between I
2
C and SPI protocols. SPI is
selected by default.
The
Speed drop-down list allows the user to select the bus clock frequency, depending
on the selected protocol I
2
C or SPI. If I
2
C-bus is selected, the Speed drop-down list
allows the selection of one of three values: 100 kHz (default value), 400 kHz and 1 MHz.
For SPI only one value (2 MHz) is available.
Send button: sends the new values to NTS0304EUK IC. The Output box located to the
wiper output of the digital potentiometer shows the translated output voltage.
If the voltage typed in the
Set Output Voltage box is greater than 2.5 V, a pop-up
window appears with the message
“Voltage should be less than or equal to 2.5V”
. If the
Set Output Voltage box remains empty, a pop-up window appears with the message
“Please enter the output voltage”
. Click “ OK ” to close the pop-up window.
UM11762 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2022. All rights reserved.
User manual Rev. 1.0 — 27 May 2022
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