Datasheet

MAX34451 PMBus 16-Channel V/I Monitor and
12-Channel Sequencer/Marginer
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Table 35. MFR_CHANNEL_CONFIG (E4h)
Table 36. Fault-Monitoring States
*For proper sequencing, the SELECT bits in MFR_PSEN_CONFIG must be set to 000.
Note: Device response to faults is determined by the configuration of MFR_FAULT_RESPONSE.
BIT NAME MEANING
15:12 0
Thesebitsalwaysreturna0.
11:8 SEQ_GENERATE
These bits determine which SEQ signature the channel should generate after crossing the
POWER_GOOD_ONlevel:
 0000 Disabled 1000 Signature8
 0001 Signature1 1001 Signature9
 0010 Signature2 1010 Signature10
 0011 Signature3 1011 Signature11
 0100 Signature4 1100 Signature12
 0101 Signature5 1101 Signature13
 0110 Signature6 1110 Signature14
 0111 Signature7 1111 Signature15
7:6 0 Thesebitsalwaysreturna0.
5:0 SELECT[5:0]
ThesebitsselectthefunctionoftheRSn/GPInpins:
SELECT[5:0] SELECTEDCHANNELFUNCTION
 010000(10h) Sequencing+voltagemonitoring(onlyvalidforPAGES0–11)*
 100000(20h) Voltagemonitoring(nosequencing)
 100010(22h) Currentmonitoring
 100001(21h) Voltagereadonly
 100011(23h) Currentreadonly
 110000(30h) General-purposeinputactivelow
 110100(34h) General-purposeinputactivehigh
 000000(00h) Disabled
FAULT
REQUIRED DEVICE CONFIGURATION
FOR ACTIVE MONITORING
WHEN MONITORED
Overvoltage
•
Voltagemonitoringenabled
(SELECT[5:0]=10hor20hinMFR_CHANNEL_CONFIG)
Continuous monitoring.
Undervoltage
•
Voltagemonitoringenabled
(SELECT[5:0]=10hor20hinMFR_CHANNEL_CONFIG)
Stopsmonitoringwhilethepowersupplyis
off;startsmonitoringwhenvoltageexceeds
thePOWER_GOOD_ONlevel.
Overcurrent
•
Currentmonitoringenabled
(SELECT[5:0]=22hinMFR_CHANNEL_CONFIG)
Continuous monitoring.
Power-UpTime
• Sequencingenabled
(SELECT[5:0]=10hinMFR_CHANNEL_CONFIG)
Monitored only during power-on sequence.
Overtemperature
• Temperature sensor enabled
(ENABLE=1inMFR_TEMP_SENSOR_CONFIG)
Continuous monitoring.