10.3
DPM Functions
10.3.1 POL Programming
POL programming is the process of downloading the content of POL setup registers stored in DPM’s non-volatile
memory via the SD bus to the POL converters.
Programming of POL converters is performed upon power-up, or when the Program button is pressed in the GUI
System Configuration window shown in Figure 8, or when the specific command is sent directly via the I2C bus.
Figure 8. System Configuration Window
The programming is performed in several steps. Once the supply voltage on the VDD pins of the DPM exceeds the
UVLO protection threshold, the DPM will start copying setup registers from its non-volatile memory into RAM and
execute the cyclic redundancy check (CRC) to ensure integrity of the programming data. When the voltage on the
IBVS pin exceeds the IBV undervoltage protection threshold, the DPM will download POL setup registers to the
respective POL converter via the SD line. Every data transfer is protected by parity check and followed by the POL
acknowledgement and read data back procedure. If both acknowledgement and readback operations are successful,
the POL-specific bit in the POL Programming Status registers will be set. The DPM considers the POL converter to
be programmed, and continues programming the next POL converter.
Upon completion of the programming, the DPM will turn-on the POL converters, if the Auto Turn-On is enabled in
the POL Group configuration window shown in Figure 9 (topmost group of square buttons just below "Bus Voltages"
tab. Otherwise, the user will need to send the turn-on command via the I2C bus.
ZD-00896 Rev. 5.2, 9-Apr-13
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