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3.3 GUI System Configuration Window
3.4 GUI Rail Configuration Window
GUI Overview
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The System Configuration window on the GUI is shown in Figure 6 and allows the following to be
configured in the UCD9081:
Figure 6. GUI System Configuration Window
•
Shutdown Delays —specify shutdown delays for rails and GPOs. If a rail or GPO is marked to shut
down, then it shuts down according to the shutdown delays entered here. These shutdown delay fields
correspond to the UnsequenceTime registers in the UCD9081 device data sheet (
SLVS813 ).
•
Voltage Reference —selects the device voltage reference. The UCD9081EVM is configured by default
to use the external reference (VCC supply for the sequencer). When VCC is selected as the reference,
the GUI provides for actual VCC calibration to be entered. For example, if the actual device VCC
voltage is 3.1 V, the GUI can use this to properly scale the displayed voltages.
Note: When the reference is changed and stored to the GUI buffer, the displayed rail voltages are
incorrectly scaled, until the device parameters are updated.
•
Pin Function Select —helps you select the EN8 or GPO1 function. The function selected disables the
other function from being configured.
•
Sequence Control —Checking the Ignore Flash Error Log box allows the sequencer to restart when
errors are present in flash. Default operation forces the user to manually clear the flash error before the
sequencer will restart.
•
Store to Buffer and Close Buttons —The Store to Buffer button saves the current window entries to a
GUI buffer, and the Close button closes the window without saving the form entries.
The Rail Configuration window on the GUI is shown in Figure 7 and permits you to configure these
UCD9081 items:
Figure 7. GUI Rail Configuration Window
10 UCD9081 Power Supply Sequencer and Monitor EVM SLVU249 – September 2008
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