GUI Register Page
12
SNVA481B – October 2011 – Revised January 2020
Copyright © 2011–2020, Texas Instruments Incorporated
AN-2143 LM5064 Evaluation Kit
Figure 11. LM5064 Register Page
Telemetry is updated by clicking the Update Telemetry button. This action will update the fields under the
Averaged heading and under the Immediate heading along with VAUX and PEAK PIN. Select which
parameters to update by clicking in the box next to each parameter. If all parameter boxes under a given
heading are checked, the "Update Telemetry" button will use the block read PMBus commands
(AVG_BLOCK_READ and BLOCK_READ) to update the fields, ensuring that the readings are time
aligned. If one or more of the boxes under the headings is not checked, the "Update Telemetry" button will
use the respective individual read PMBus commands to make the telemetry readings and the
measurements will not be time aligned. VAUX and PEAK PIN are always read with discrete PMBus
commands and, therefore, are never time aligned. The "CLEAR_PIN_PEAK" button is provided to clear
the PEAK PIN reading which is often much higher than one would expect under steady state conditions.
This is related to the large inrush current during power-on that gets sampled by the internal power
measurement circuitry and used to calculate PEAK PIN.
The output can be turned off and on using the "OPERATION" button, and the Identification Information
can be obtained by clicking the "Update ID Information" button. The rest of this page is used to monitor
and diagnose warning and fault conditions. The SMBA and PGOOD interrupts will indicate if a warning or
fault has occurred and if the output voltage is within specifications. They are always active and there is no
need to click an "Update Telemetry" button to change their state. Clicking the "Update Status" button
under the Register Operation Control heading will update the bits in all of the registers, as well as the
telemetry, under the Status section. Clicking the "CLEAR_FAULTS" button will reset all warning and fault
bits and issue an Update Status. If the warning and/or fault condition has been remedied, the bits will
reset. If the warning and/or fault condition still exists, the registers will be updated within a millisecond and
thus will appear to never have been cleared. The STATUS_WORD, STATUS_INPUT, STATUS_CML and
DIAGNOSTIC_WORD registers operate in a cumulative way. That is, these registers display any and all
warnings and errors that have occurred since the last CLEAR_FAULTS command was issued. The
telemetry and DIAGNOSTIC_WORD that are part of the BLACK_BOX_READ are also updated by clicking
the Update Status button. These telemetry parameters and bits are latched at the moment the SMBA