Vicor PI33XX-2X I2C Digital Interface Guide - Manual (Page 20)

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PI33XX-2X I
2
C Digital Interface Guide
Configuration Example - Setting Kill Bit
The procedure for setting the KBIT2 register to prevent any further programming is outlined in sequence in Figure
26. The SYN[3:0] register has been programmed to “1111” and the ENA_POL register has been programmed to “1”
in advance. Like the previous procedures, the first two bus transactions occur while the PI33XX-2X is enabled and
the final transaction occurs while the PI33XX-2X is disabled. After completing this step, no further changes can be
made to the PI33XX-2X. It is very important to double check all settings before clicking the “BURN” button. If the
user makes a mistake in a setting after clicking on the “BURN” button, the instructions for enabling and disabling
the unit that are prompted by Picor Buck GUI should be IGNORED by leaving the target enabled and clicking “OK”
to each pop up dialog box. This will prevent the burn from occurring and give the user another chance to correct
the mistake. Picor Buck GUI will report the failed burn with a pop up dialog box.
Figure 26 - Setting KBIT2 Register After Setting ENA_POL Register to “1” With SYN[3:0] Programmed to “1111”