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3.2.1
I
2
C Addresses
3.3
GUI System Configuration Window
Shutdown Delays
GPO
Voltage Reference
Function Select
Store to Buffer
I2C Configuration
GUI Overview
The
View
menu includes these commands:
•
System Configuration
—provides system voltage reference and shutdown delay field entries.
•
Rail Configuration
—provides rail configuration field entries. All Rails simultaneously opens all rail
forms for comparison setup.
•
GPO Configuration
—provides GPO configuration field entries. All genral-purpose outputs (GPOs)
simultaneously open all GPO windows for setup comparisons.
•
User Data
—provides specific user data to be uploaded to the device, such as customer specific
identification.
Users can change the detected I
2
C address on the EVM by modifying the state of jumpers JP17–JP20. If
the jumpers are changed during GUI operation, the user has to perform an I2C Discover command, as
previously described.
The System Configuration window on the GUI is shown in
and allows the following to be
configured in the UCD9080:
Figure 4. 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 UCD9080 device data sheet (
).
•
Voltage Reference
—selects the device voltage reference. The UCD9080EVM 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.
•
Function Select
—helps you select the EN8 or GPO1 function. The function selected disables the
other function from being configured.
SLVU184A – March 2007 – Revised February 2008
UCD9080 Power Supply Sequencer and Monitor Evaluation Module
7
