Datasheet

MAX34451 PMBus 16-Channel V/I Monitor and
12-Channel Sequencer/Marginer
www.maximintegrated.com
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Table 9. PAGE (00h) Commands
*PAGES 0–11 can also be used to configure GPI and GPO operation.
PMBus Commands
Asummary of the PMBus commands supported bythe
device are described in the following sections.
PAGE (00h)
The device can monitor up to 16 voltages or currents,
sequence up to 12 power supplies, and margin up to
12 power supplies. The device can monitor up to five
temperature sensors, one internal local temperature
sensor, plus four external remote temperature sensors
(DS75LV).Allthemonitoringandcontrolisaccomplished
using one PMBus (I
2
C) address. Send the PAGE com-
mand with data 0–20 (decimal) to select which power
supply or temperature sensor is affected by all the fol-
lowing PMBus commands. Not all commands are sup-
ported within each page. If an unsupported command is
received,theCMLstatusbitisset.Somecommandsare
common, which means that any selected page has the
same effect on and the same response from the device.
SeeTable9forPAGEcommands.
Set the PAGE to 255 when the following PMBus
commands should apply to all pages at the same time.
Thereareonlyafewcommands(OPERATION,CLEAR_
FAULTS)wherethisfunctionhasarealapplication.
PAGE* ASSOCIATED CONTROL
0
PowersupplymonitoredbyRS0,controlledbyPSEN0,andmarginedwithPWM0.
1 PowersupplymonitoredbyRS1,controlledbyPSEN1,andmarginedwithPWM1.
2 PowersupplymonitoredbyRS2,controlledbyPSEN2,andmarginedwithPWM2.
3 PowersupplymonitoredbyRS3,controlledbyPSEN3,andmarginedwithPWM3.
4 PowersupplymonitoredbyRS4,controlledbyPSEN4,andmarginedwithPWM4.
5 PowersupplymonitoredbyRS5,controlledbyPSEN5,andmarginedwithPWM5.
6 PowersupplymonitoredbyRS6,controlledbyPSEN6,andmarginedwithPWM6.
7 PowersupplymonitoredbyRS7,controlledbyPSEN7,andmarginedwithPWM7.
8
PowersupplymonitoredbyRS8,controlledbyPSEN8,andoptionallymarginedbyOUT0ofexternal
DS4424atI
2
CaddressA0h.
9
PowersupplymonitoredbyRS9,controlledbyPSEN9,andoptionallymarginedbyOUT1ofexternal
DS4424atI
2
CaddressA0h.
10
PowersupplymonitoredbyRS10,controlledbyPSEN10,andoptionallymarginedbyOUT2ofexternal
DS4424atI
2
CaddressA0h.
11
PowersupplymonitoredbyRS11,controlledbyPSEN11,andoptionallymarginedbyOUT3ofexternal
DS4424atI
2
CaddressA0h.
12 ADCchannel12(monitorsvoltageorcurrent)orGPI.
13 ADCchannel13(monitorsvoltageorcurrent)orGPI.
14 ADCchannel14(monitorsvoltageorcurrent)orGPI.
15 ADCchannel15(monitorsvoltageorcurrent)orGPI.
16 Internal temperature sensor.
17
ExternalDS75LVtemperaturesensorwithI
2
Caddress90h.
18 ExternalDS75LVtemperaturesensorwithI
2
Caddress92h.
19 ExternalDS75LVtemperaturesensorwithI
2
Caddress94h.
20 ExternalDS75LVtemperaturesensorwithI
2
Caddress96h.
21–254 Reserved.
255 Applies to all pages.