MAX34441 MAXIM [Maxim Integrated Products], MAX34441 Datasheet - Page 36

• Manufacturer Part Number: MAX34441
• Description: PMBus 5-Channel Power-Supply Manager and Intelligent Fan Controller
• Manufacturer: MAXIM [Maxim Integrated Products]

PMBus 5-Channel Power-Supply Manager
and Intelligent Fan Controller
The STATUS_WORD command returns 2 bytes of information with a summary of the reason for a fault. The low byte of
the STATUS_WORD is the same data as the STATUS_BYTE. Table 21 describes the STATUS_WORD message content.
The STATUS_VOUT command returns 1 byte of information with contents as described in Table 22.
Table 22. STATUS_VOUT
The STATUS_CML command returns 1 byte of information with contents as described in Table 23.
Table 23. STATUS_CML
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Table 21. STATUS_WORD
BIT
BIT
BIT
1:0
5:1
9:6
15
14
13
12
11
10
7
6
5
4
3
2
7
6
0
5
4
3
2
1
0
NONE OF THE ABOVE A fault or warning not listed in bits [7:1] has occurred.
FAULT_LOG_FULL
TON_MAX_FAULT
VOUT_OV_FAULT
VOUT_OV_WARN
VOUT_UV_FAULT
VOUT_UV_WARN
POWER_GOOD#
TEMPERATURE
COMM_FAULT
DATA_FAULT
BIT NAME
BIT NAME
BIT NAME
VOUT_OV
IOUT_OC
VOUT
FANS
IOUT
CML
MFR
0
0
0
0
0
0
An invalid or unsupported command has been received.
An invalid or unsupported data has been received.
These bits always return a 0.
MFR_NV_FAULT_LOG is full and needs to be cleared.
An output voltage fault or warning or TON_MAX_FAULT has occurred.
An overcurrent fault or warning has occurred.
This bit always returns a 0.
A bit in STATUS_MFR_SPECIFIC has been set.
A power-supply voltage has fallen from POWER_GOOD_ON to less than POWER_GOOD_OFF.
A fan fault has occurred.
These bits always return a 0.
An overvoltage fault has occurred.
An overcurrent fault has occurred.
This bit always returns a 0.
A temperature fault or warning has occurred.
A communication, memory, or logic fault has occurred.
VOUT overvoltage fault.
VOUT overvoltage warning.
VOUT undervoltage warning.
VOUT undervoltage fault.
This bit always returns a 0.
TON maximum fault.
These bits always return a 0.
MEANING
MEANING
MEANING
STATUS_WORD (79h)
STATUS_VOUT (7Ah)
STATUS_CML (7Eh)