zm7100 Power-One, zm7100 Datasheet - Page 11

• Manufacturer Part Number: zm7100
• Description: Zm7100 Series Digital Power Manager
• Manufacturer: Power-One

ZM7100 Series Digital Power Manager
Data Sheet
Programming of POL converters is performed upon power-up, or when the Program Config… button is pressed in
the GUI System Configuration window shown in Figure 3, or when the high level command is sent directly via the
2
I
C bus.
Figure 3. System Configuration Window
The programming is performed in several steps. Upon power-up, when the voltage on the IBV_S pin exceeds the
undervoltage protection threshold, the DPM uploads programming data from its static registers into RAM. Then
the DPM executes the cyclic redundancy check (CRC) to ensure integrity of the programming data. If the result is
OK, then the programming data stored in registers 00h through 14h of the DPM is sent to the respective POL
converter via the SD line. Every data transfer command 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 converter is considered programmed, and the DPM continues with programming of the next
POL converter. It takes DPM approximately 17ms to program one POL.
Upon completion of the programming cycle, programming status information is recorded in the registers PPS0-
PPS3, and IMS shown in Figure 4 and Figure 5.
REV. 4.0 JUL 28, 2006
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