Datasheet

MAX34460 Evaluation Kit
Evaluates: MAX34460
9Maxim Integrated
Status Tab
The Status tab sheet (Figure 5) displays all the faults,
warnings, and device ID information. To read all the
current output values, faults, and warnings, press the
Read Status button or turn on Auto Polling. The
fault and warning bits are read from STATUS_VOUT
(7Ah), STATUS_MFR_SPECIFIC (80h) and STATUS_
TEMPERATURE(7Dh).ThePolled values are read from
READ_VOUT (8Bh) and READ_TEMPERATURE (8Dh).
Each color indicator turns green if the status is good,
red if there is a fault, or yellow to indicate a warning. The
Polled value may not reflect the fault or warning because
some bits are latches and have to be cleared. To clear the
faults and warnings, press the Clear Faults button, which
sends the CLEAR_FAULTS (03h) command. The alarm
faults are also latches and have to be cleared by press-
ing the Clear Alarm
 button to set a bit in MFR_MODE
(D1h). The Time Count displays the 32-bit counter read
fromtheMFR_TIME_COUNT(DDh)command.Thistimer
can be reset by pressing the Reset Time Count button,
which writes a sequence of all zeros, all ones, and all
zerostoMFR_TIME_COUNT(DDh).TheID COMMANDS
table displays all the ID information of the device. Press
the Read ID button to read all the commands in the table.
Data Log Graph Tab
The Data Log Graph tab sheet (Figure 6) plots the
polled values in a graph and keeps track of the mini-
mum and maximum values for each channel voltage and
each temperature sensor. To read and plot the polled
values, press the Data Log Read button or turn on Auto
Polling. Each data log reads every channel’s voltage
from READ_VOUT (8Bh) and every temperature sensor
from READ_TEMPERATURE (8Dh). The software finds
the minimum and maximum values over multiple reads.
The Poll Count displays the number of reads that have
been tracked in the data log. When the polled count
reaches 10,000, the graph deletes the oldest polled
values and adds a new polled value. The min/max values
are still based on all the poll count values, but the graph
only displays the latest 10,000 polled values. To reset the
Poll Count and all the minimum and maximum values,
press the Data Log Reset button. To turn off data logging
during polling, check the Data Log Off checkbox. The
Select Data combo box is used to select the voltage or
temperature data to display on the graph and in the MIN/
MAX Data table. To save all the data graphed to a CSV
file, press the Save Data Log button.
Fault Log Tab
The Fault Log tab sheet (Figure7) displays the NV Fault
Log
andfaultconfigurations. When the tab is selected,
the Overwrite and Fault Log Depthareread.Whenthe
fault log is full, the Enable Overwrite can be checked to
automatically overwrite previous logs. The fault log depth
can be adjusted with the Fault Log Depth combo box.
The Enable Overwrite and Fault Log Depth are read
from bits in MFR_NV_LOG_CONFIG (D8h). To read the
fault log, press the Read NV Fault Log button and all 255
bytesfromMFR_NV_FAULT_LOG(DCh)aredisplayedin
the table. To clear or force the fault log, press the Clear
NV Fault Log or Force NV Fault Log button, respective-
ly.ThesebuttonswritetoabitinMFR_NV_LOG_CONFIG
(D8h). To save the current fault log displayed in the table,
press the Dump to a File button and the table is saved
as a CSV file.
Registers Tab
The Registers tab sheet (Figure 8) displays all the
PMBus commands and their current data. To read the
registers, select a page from the top drop-down list and
all the PMBus commands valid for that page are auto-
matically read. The commands not valid for that page
are grayed out. Press the Read All button to read the
registers again. To write to a command, enter the hex
value in the cell and click another cell or press Enter on
the keyboard. The current register configuration can be
saved to flash by pressing the Save to Flash button,
whichsendstheSTORE_DEFAULT_ALL(11h)command.
To return the device to the configuration saved in flash,
press the Restore from Flash button, which sends the
RESTORE_DEFAULT_ALL(12h) command. Toresetthe
device, press the Soft Reset button to write to a bit in
MFR_MODE (D1h). The Calculate CRC button sends
theRESTORE_DEFAULT_ALL(12h)commandandthen
calculatesa2-byteCRCbasedonPMBusconfiguration
commands that are stored in flash. The Read CRC from
MFR_DATE
buttonreadsMFR_DATE(9Dh)anddisplays
the upper 2 bytes in the edit box below the button. The
Calculate CRC & Write to MFR_DATE button sends the
RESTORE_DEFAULT_ALL(12h) command, calculatesa
CRC,writestheCRCtotheupper2bytesofMFR_DATE
(9Dh), and sends STORE_DEFAULT_ALL (11h) com-
mand. The Command Description displays the bitmap
for selected PMBus commands. Select the command
from the drop-down list and the table below displays a
description of each bit for that command.