MAX34451EVKIT Datasheet, PDF (9/31 Pages) Maxim Integrated Products – Easy Evaluation of the MAX34451

MAX34451 Evaluation Kit
Evaluates: MAX34451
PSEN/GPO Tab
The PSEN/GPO tab sheet (Figure 4) sets the function of
the PSENn pins. The Output Select, PG/GPI or Alarm
Channel Select, and PSEN/GPO Output Type columns
write to bits in the MFR_PSEN_CONFIG (D2h) command.
Output Select sets the function of the PSENn pin and the
PSEN/GPO Output Type column sets the output logic of
the pin. For PSEN10 and PSEN11, the Output Select
column has an extra option to configure PSEN10 as
FAULT2 and PSEN11 as SEQ. If either of these options
are selected, jumpers J5 or J4 on the EV kit board should
be moved to the corresponding position. The PG/GPI
or Alarm Channel Select, TON Delay (TON_DELAY
60h) and TOFF Delay (TOFF_DELAY 64h) columns can
only be edited when the Output Select is set to PG/GPI
Combination or ALARM.
PWM/GPO Tab
The PWM/GPO tab sheet (Figure 5) sets the function of
the PWMn pins. All the columns in the PWM table write to
the MFR_PWM_CONFIG (E7h) command. The Output
Select column sets the function of the PWMn pin and
the PWM/GPO Output Type sets the output logic of the
pin. For PWM7, the Output Select column has an extra
option to configure it as FAULT1. If this option is selected,
jumper J6 on the EV kit board should be moved to the
FAULT1 position. The PG/GPI or Alarm Channel Select,
ON Delay, and OFF Delay columns can only be edited
when the Output Select is set to PG/GPI Combination
or ALARM.
Fault Config Tab
The Fault Config tab sheet (Figure 6) contains all the
fault configuration settings. The Fault Retry time sets the
value in MFR_FAULT_RETRY (DAh). The fault configura-
tion table writes to a channel’s MFR_FAULT_RESPONSE
(D9h). To edit a channel’s configuration, the Input Select
on the Monitoring tab must be set to monitor voltage or
current. To edit the FAULT Pin Assertion or FAULT Pin
Response columns, set the Global column to Global.
Margining Tab
The Margining tab sheet (Figure 7) includes the margin
configurations, margin fault status, a PWM calculator,
and a DAC calculator for the DS4424. All values on the
tab are read when the tab is selected. To edit a chan-
nel’s margin options, the Output Select on the PSEN/
GPO tab must be set to Power Supply Enable (PSEN)
and the Input Select on the Monitoring tab must be
set to Sequence + Voltage Monitor. For channels 0–7,
the Output Select on the PWM/GPO tab must also be
set to PWM Operation. The Margin column turns the
margin on/off by writing to the OPERATION (01h) com-
mand. To force all the channels to the same margin,
select the state in the Margin All Control drop-down list.
The Slope, Open Loop, PWM Level, and DAC Value
configure the PWMn outputs and the external DS4424
by writing bits in the MFR_MARGIN_CONFIG (DFh)
command. The margining limits can be set by entering
the voltage level or the percent of the nominal in the
Margin Low (VOUT_MARGIN_LOW 26h) and Margin
High (VOUT_MARGIN_HIGH 25h) columns. When the
margining is turned on, the margin fault status is shown in
the Status column read from STATUS_MFR_SPECIFIC
(80h). The Polled column displays the channel voltage
read from READ_VOUT (8Bh). To read the Status and
Polled values, press the Read Status and Vout button
or turn on polling with the Auto Polling On button. The
margin faults can be cleared by pressing the Clear Faults
button in the status bar.
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