Texas Instruments UCD9080EVM, Руководство пользователя

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3.4.2 Sequencing Conditions Selections
3.4.3 Alarm Actions
3.5 GUI GPO Configuration Window
GPO Configuration Window
Sequence Event Parameters
registers (RAIL/GPO bits)
Active Low (GPO Polarity)
Enable Polarity register
Sequence after Shutdown
Sequence Event Link
registers (RESEQ bit)
Sequencing Conditions
Sequence Event Parameters
registers (ENABLE bits)
Sequencing Conditions
Sequence Event Data registers
(RAILDATA bits)
Sequencing Conditions
Sequence Event Link registers
(PARENTRAIL bits)
3.5.1 General GPO Window Selections
GUI Overview
Voltage rail sequencing conditions are:
•
None —rail is not sequenced.
•
Time —number of milliseconds before this rail is enabled.
•
Parent (Reg) —number of milliseconds to delay after the parent rail achieves regulation before
enabling this rail.
•
Parent (V) —voltage at which the parent rail should be before this rail is enabled
The alarm actions are:
•
Log Only —ignore any failures on this rail, and keep it enabled.
•
Retry —continue to retry a configurable number of times (n = 0,1,2,3,4), then shut down according to
the DependencyMasks and UnsequenceTime registers.
•
Retry Continuously —when an error on the selected rail happens, a retry occurs. A retry is an attempt
by the UCD9080 to restart the corresponding power supply by disabling the rail (with ENx pin) and
then re-enabling the rail. This repeats until the power supply rail alarm clears.
•
Sequence —when there is an error on this rail, resequence the system according to the current
sequencer configuration.
The GPO Configuration windows displays in Figure 6 and provides for these UCD9080 configuration
settings:
Figure 6. GUI GPO Configuration Window
•
Active Low (Polarity) —specifies GPO pin polarity
•
Sequence after Shutdown —UCD9080 ENx and GPOs output can be marked to re-sequence the
system (as defined by the current sequencer configuration) if they are specified as a dependency in
the DependencyMasks register.
SLVU184A – March 2007 – Revised February 2008 UCD9080 Power Supply Sequencer and Monitor Evaluation Module 9
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