Advanced PMBus GUI description
UM0718
18/31
Doc ID 15846 Rev 1
3
Advanced PMBus GUI description
The PMBus GUI consists of 8 different windows where the device selection is the parent
window:
1.
Device selection window
2.
Device setup window
3.
Loop comp. window
4.
Fault management window
5.
Device information window
6.
Device status window
7. Manual
command
window
8.
Advanced setup window
3.1
Device selection window
The device selection window is the parent window of the GUI and opens automatically as
soon as the demonstration board is connected, irrespective of whether the slave is
connected or not. This window has the following options:
1.
Device selection
2. Memory
3. Device
control
4. Device
monitoring
3.1.1
Device selection window
As soon as the demonstration board is connected, the user must perform polling to identify
the connected PMBus slave devices. After polling the bus, the GUI shows the list of
connected slaves which can be selected, one at a time, for configuration or monitoring. As
soon as the slave is selected, and the bus setting window is clicked, the CAPABILITY
command is sent. The CAPABILITY command reads the supported features of the slave
device.
Based on the data received from the slave, the buttons on the GUI are enabled or disabled.
For example, if the slave does not support the PEC, the PEC enable button is disabled.
Similarly, the alert and 400 kHz buttons are disabled if not supported by the slave.
Figure 17.
Slave not supporting alert feature
Once PEC is enabled, this interface board communicates the PEC value after the last byte,
in case it is a transmitter. The receiver returns a NACK for the PEC value, if the PEC value of
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