MIC24045 Evaluation Board User’s Guide
DS50002619A-page 18
2017 Microchip Technology Inc.
This area of the GUI allows the user to modify the device features. For the MIC24045
device, the features which can be modified trough I
2
C are the switching frequency, the
current limit, the soft-start time, the startup-delay, the output voltage and the output
voltage margining. For the limitations and permissible settings of the MIC24045, refer
to the device datasheet.
Note that the
Enable
button does not control the device trough I
2
C, but through a direct
hardware connection to the MIC24045 EN pin.
4.2.5
MIC24045 I
2
C Diagnostic
The MIC24045 Diagnostic area contains the items in
Table 4-4
.
FIGURE 4-5:
MIC24045 I
2
C Diagnostic Area.
The MIC24045 I
2
C Diagnostic area resumes the information contained in the Status
register. The Status register contains latched (Flag) or non-latched (Status) bits. Flag
bits are set when the corresponding fault condition occurs and do not return to zero
once the fault conditions ceases. If such a fault occurs, it is the user’s responsibility to
clear it trough the
Clear Faults
button. Status bits are set when the corresponding fault
condition has occurred, and return to zero automatically once the fault condition has
ceased. This information is refreshed once every two seconds.
Because of this refresh traffic, when using a logic analyzer, it is more difficult to
synchronize the exact moment of a certain command. In order to simplify this, an
auxiliary trigger signal is used on pin GP0 of the MCP2221 and is routed on an external
Test Point. This signal is triggered for each user read/write command.
TABLE 4-4:
MIC24045 I
2
C DIAGNOSTIC AREA ITEMS
Panel
Items
Description
Status
Non-Latched
Power Good, Enable Pin bits logic values (ticked =
'
1
', blank = '
0
')
Latched
Thermal Warning, Thermal Shutdown, Overcurrent
(ticked = '
1
', blank = '
0
')
Clear Faults
This button allows the user to clear the faults.
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