Datasheet

MAX34451 PMBus 16-Channel V/I Monitor and
12-Channel Sequencer/Marginer
www.maximintegrated.com
Maxim Integrated │ 42
READ_VOUT (8Bh)
The READ_VOUT command returns the actual mea-
sured(notcommanded)outputvoltage.READ_VOUTis
measured and updated every 5ms. If the RSn/GPIn
is configured to be a general-purpose input (GPI), by
configuringtheSELECTbitsinMFR_CHANNEL_CONFIG
to either 30h or 34h, then READ_VOUT reports 0000h
whentheGPIninputisinactiveand0001hwhentheGPIn
inputisactive.The2databytesareinDIRECTformat.
READ_IOUT (8Ch)
TheREAD_IOUTcommandreturnsthelatestmeasured
current value. READ_IOUT is measured and updated
every5ms.The2databytesareinDIRECTformat.
READ_TEMPERATURE_1 (8Dh)
The READ_TEMPERATURE_1 command returns the
temperature returned from the temperature sensor.
READ_TEMPERATURE_1 returns 7FFFh if the sensor
is faulty and 0000h if the sensor is disabled. READ_
TEMPERATURE_1 is measured and updated once per
second.The2databytesareinDIRECTformat.
PMBUS_REVISION (98h)
ThePMBUS_REVISIONcommandreturnstherevisionof
thePMBusspecificationtowhichthedeviceiscompliant.
Thecommandhas1databyte.Bits7:4indicatetherevi-
sionofthePMBusspecificationPartItowhichthedevice
iscompliant.Bits3:0indicatetherevisionofthePMBus
specificationPartIItowhichthedeviceiscompliant.This
command is read-only. The PMBUS_REVISION value
returned is always 11h, which indicates that the device is
compliantwithPartI,Rev1.1andPartII,Rev1.1.
MFR_ID (99h)
TheMFR_IDcommandreturnsthetext(ISO/IEC8859-1)
character of the manufacturer’s (Maxim) identification.
ThedefaultMFR_IDvalueis4Dh(M).Thiscommandis
read-only.
MFR_MODEL (9Ah)
The MFR_MODEL command returns the text (ISO/IEC
8859-1) character of the device model number. The
defaultMFR_MODELvalueis59h(Y).Thiscommandis
read-only.
MFR_REVISION (9Bh)
The MFR_REVISION command returns two text (ISO/
IEC8859-1) characters that contain the device revision
numbersforhardware(upperbyte)andfirmware(lower
byte).Thiscommandisread-only.
MFR_LOCATION (9Ch)
The MFR_LOCATION command loads the device with
text (ISO/IEC 8859-1) characters that identify the facil-
ity that manufactures the power supply. The maximum
numberofcharactersis8.Thisdataiswrittentointernal
flash using the STORE_DEFAULT_ALL command. The
factory-defaulttextstringvalueis10101010.
MFR_DATE (9Dh)
The MFR_DATE command loads the device with text
(ISO/IEC 8859-1) characters that identify the date of
manufacture of the power supply. The maximum number
of characters is 8. This data is written to internal flash
usingtheSTORE_DEFAULT_ALLcommand.Thefactory-
defaulttextstringvalueis10101010.
MFR_SERIAL (9Eh)
The MFR_SERIAL command loads the device with
text (ISO/IEC 8859-1) characters that uniquely identify
the device. The maximum number of characters is 8.
This data is written tointernalflash using the STORE_
DEFAULT_ALLcommand.Thefactorydefaulttextstring
valueis10101010.Theupper4bytesofMFR_SERIAL
are used to unlock a device that has been password pro-
tected.Thelower4bytesofMFR_SERIALarenotusedto
unlock a device and they can be set to any value.
MFR_MODE (D1h)
The MFR_MODE command is used to configure the
device to support manufacturer-specific commands.
The MFR_MODE command should not be changed
while power supplies are operating. The MFR_MODE
command is described in Table 26.