Datasheet

MAX34451 PMBus 16-Channel V/I Monitor and
12-Channel Sequencer/Marginer
www.maximintegrated.com
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Table 11. OPERATION (01h) Command Byte with PAGE = 255
(When Bit 3 of ON_OFF_CONFIG = 1)
Table 12. OPERATION (01h) Command Byte (When Bit 3 of ON_OFF_CONFIG = 0)
Note: Special device OPERATION commands are shaded; when the OPERATION command is read, the device always responds
with the standard command; all enabled channels must exceed POWER_GOOD_ON for margining to begin.
Note: The device only takes action if the supply is enabled; all enabled channels must exceed POWER_GOOD_ON for margining to
begin; if PAGE is set to 255, both SEQUENCE0 and SEQUENCE1 are affected.
COMMAND BYTE POWER SUPPLY ON/OFF SEQUENCE AFFECTED MARGIN STATE
00h
Immediate off
(nosequencing)
SEQUENCE0and
SEQUENCE1
n/a
01h
SEQUENCE0only
02h SEQUENCE1only
40h
Soft-off
(withsequencing)
SEQUENCE0and
SEQUENCE1
41h
SEQUENCE0only
42h SEQUENCE1only
80h
On
SEQUENCE0and
SEQUENCE1
Margin off
81h
SEQUENCE0only
82h SEQUENCE1only
94h On
SEQUENCE0and
SEQUENCE1
Marginlow(ignoreallfaults)
98h On Marginlow(actonanyfault)
A4h On Marginhigh(ignoreallfaults)
A8h On Marginhigh(actonanyfault)
COMMAND BYTE
POWER SUPPLY
ON/OFF
MARGIN STATE
00h
Commandhasnoeffect
n/a
40h
80h Margin off
94h
Marginlow(ignoreallfaults)
98h Marginlow(actonanyfault)
A4h Marginhigh(ignoreallfaults)
A8h Marginhigh(actonanyfault)