Datasheet

MAX34460 Evaluation Kit
Evaluates: MAX34460
3Maxim Integrated
The Connection menu item allows the user to connect
to a desired device. Find Slave Addresses searches for
all slave addresses connected to the I
2
C bus. To select
a device, click Select Slave Address and all the slave
addresses found are shown and are selectable. Slave
addresses 18h and 34h are not selectable to prevent
communicating with the alert response address and
factory-programmed address.
The Auto Polling menu item has options for auto-
matic reading of the device. To start polling, select
the delay between reads: 300ms, 500ms, 800ms, or
1000ms. Each poll reads the Power Status (STATUS_
WORD 79h), Fault Status (STATUS_WORD 79h), and
the polled values for the Data Log Graph tab. The
Status and Margining tabs are only polled if the tab is
currently selected. To stop polling, select Off from the
menu. Polling can also be stopped by selecting items in
the File menu, Connection menu, or by pressing buttons
that involve action with the NV Fault Log or flash.
The Device menu item shows which device the tables
and controls are configured for. To turn the power
supplies on or off, select the Power On/Power Off
button, which writes a value to the OPERATION (01h)
command. The supplies power on with margining off and
power off based on the Power Down Action drop-down
list on the Sequencing
tab.WhentheGUI Lock is on, all
writing actions are disabled.
Status Log
The status log below the tabs displays all the actions the
GUIperforms.WheneveraPMBuscommandisreador
written, the action is confirmed by the log. To save the
log, press the Save Log button and the text in the box
is saved to a .TXT file. The log can also be cleared by
pressing the Clear Log button.
Sequencing Tab
The Sequencing tab sheet (Figure 1) includes all timing
and alarm configurations. All values on the tab are read
when the tab is selected. The channels can be set up in
one or two groups by selecting the Single or Dual radio
button under Sequencing Mode.
WhenSingle is select-
ed, the Group column is forced to Primary. The channels
can also be sequenced based on time or event by select-
ing the option from the Sequencing Mode drop-down
list. If PMBus (time-based) is chosen, then the values
under the Timeslot
(MFR_SEQ_TIMESLOTD3h)column
are all written to 0. The Sequencing Mode radio buttons
and drop-down lists write to bits in MFR_MODE (D1h).
The channels can be powered down simultaneously or
with a TOFF delay by selecting the option in the Power
Down Action drop-down list that writes to a bit in ON_
OFF_CONFIG (02h). The Fault Retry Time sets the value
in MFR_FAULT_RETRY (DAh). The Output Type writes
toMFR_PSEN_CONFIG(D2h)tosetthePSENbehavior.
For the PSEN pin to act as a normal enable/disable for
a power supply, select one of the PSEN options under
Output Type. If a GPO option is selected, the channel
is no longer a part of the sequencer, so the Timeslot
and TON Max are written to 0 and all the channel con-
figurations on the table become read-only. The timeslot
for each channel can be set by selecting a value in the
Timeslot
 column, which writes to MFR_SEQ_TIMSLOT
(D3h). Note that these values can only be changed when
the Sequencing Mode is set to Timeslot (event-based).
The Group column assigns the channel to the primary
or secondary group by writing to a bit in MFR_SEQ_
TIMESLOT (D3h). The sequencing delays can be set by
writing values to TON Delay
 (TON_DELAY 60h), TON
Max (TON_MAX_FAULT_LIMIT 62h), and TOFF Delay
(TOFF_DELAY64h). A channel can besettoglobal by
checking the checkbox in the Global column to write
toa bitinMFR_FAULT_RESPONSE (D9h).Alarm0 and
Alarm 1 can be configured to turn on for different faults
by selecting an option in the ALARM0/1 Pin Config col-
umnthatwritestobitsinMFR_FAULT_RESPONSE(D9h).
The Fault Response column writes to the TON Max Fault
responsebitsinMFR_FAULT_RESPONSE(D9h).Tolog
faults into the NV fault log, check the checkbox in the Log
Faults
 column that writes to MFR_FAULT_RESPONSE
(D9h).