Datasheet

MAX34451 PMBus 16-Channel V/I Monitor and
12-Channel Sequencer/Marginer
www.maximintegrated.com
Maxim Integrated │ 38
Figure 7. Status Register Organization
TON_MAX_FAULT_LIMIT (62h)
TON_MAX_FAULT_LIMIT sets an upper time limit, in
milliseconds, from when the PSENn output is asserted
untiltheoutputvoltagecrossesthePOWER_GOOD_ON
threshold.The2databytesareinDIRECTformat.Ifthe
value is zero, then the limit is disabled. In response to the
TON_MAX_FAULT_LIMIT being exceeded, the device
doesthefollowing:
1) SetstheVOUTbitinSTATUS_WORD.
2) SetstheTON_MAX_FAULTbitinSTATUS_VOUT.
3) RespondsasspecifiedintheMFR_FAULT_
RESPONSE.
4) NotifiesthehostusingALERT assertion (if enabled in
MFR_MODE).
VOUT_OV_FAULT
STATUS_VOUT
(PAGES 0–15)
LATCH
EVENT
FAULT_LOG_FULL
STATUS_CML
(ALL PAGES)
EVENT
DATA_FAULTLATCH
EVENT
COMM_FAULTLATCH
EVENT
MAIN_FAULTLATCH
EVENT
BACKUP_FAULTLATCH
EVENT
VOUT_OV_WARNLATCH
EVENT
VOUT_UV_FAULT OR
OR
OR
AND
CLEAR
OR
STATUS_TEMPERATURE
(PAGES 16–20)
OT_WARN
EVENT
OT_FAULTLATCH
LATCH
EVENT
STATUS_IOUT
(PAGES 0–15)
OC_FAULTLATCH
EVENT
OC_WARNLATCH
EVENT
OR
OR
OR
STATUS_MFR_SPECIFIC
(PAGE 0–15)
OFF
EVENT
POWER_GOOD#
EVENT
MARGIN_FAULTLATCH
EVENT
STATUS_MFR_SPECIFIC
(PAGES 255)
LOCK
EVENT
CONTROL#LATCH
EVENT
WATCHDOGLATCH
EVENT
FAULT_INPUTLATCH
EVENT
LATCH
EVENT
VOUT_UV_WARNLATCH
EVENT
TON_MAX_FAULTLATCH
EVENT
STATUS_WORD
(ALL PAGES)
LATCH
TEMPERATURE
SYS_OFF
POWER_GOOD#
VOUT_OV
VOUT
CML
IOUT_OC
IOUT
MARGIN
MFR
CLEAR_FAULTS COMMAND
ALERT RESPONSE ADDRESS (ARA)
RECEIVED AND ARBITRATION WON
ALERT BIT IN MFR_MODE
ALERT
OUTPUT
NOTE 1: IF AN EVENT IS STILL PRESENT WHEN THE CLEAR_FAULTS COMMAND IS ISSUED, THE BIT IS IMMEDIATELY ASSERTED AGAIN.
NOTE 2: WHEN THE ALERT LATCH IS CLEARED, IF ANY EVENTS ARE STILL PRESENT, THEY DO NOT REASSERT THE ALERT OUTPUT.