MAX34440 MAXIM [Maxim Integrated Products], MAX34440 Datasheet - Page 32

• Manufacturer Part Number: MAX34440
• Description: PMBus 6-Channel Power-Supply Manager
• Manufacturer: MAXIM [Maxim Integrated Products]

PMBus 6-Channel Power-Supply Manager
The STATUS_BYTE command returns 1 byte of information with a summary of the most critical faults. A value of 1 indi-
cates that a fault or warning event has occurred and a 0 indicates otherwise. Bits for unsupported features are reported
as 0. The STATUS_BYTE cannot be restored by the RESTORE_DEFAULT_ALL command. The STATUS_BYTE message
content is described in Table 16. This command is read-only.
Table 16. STATUS_BYTE
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 17 describes the STATUS_WORD message content.
Table 17. STATUS_WORD
32
10:6
BIT
BIT
7:6
15
14
13
12
11
5
4
3
2
1
0
5
4
3
2
1
0
NONE OF THE ABOVE A fault or warning not listed in bits [7:1] has occurred.
NONE OF THE ABOVE A fault or warning not listed in bits [7:1] has occurred.
POWER_GOOD#
TEMPERATURE
TEMPERATURE
BIT NAME
BIT NAME
VOUT_OV
IOUT_OC
VOUT_OV
IOUT_OC
VOUT
CML
IOUT
CML
MFR
0
0
0
0
0
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.
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.
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.
MEANING
MEANING
STATUS_WORD (79h)
STATUS_BYTE (78h)