Status_Word; Status_Vout; Status_Iout - Linear Technology Analog Devices LTC3882-1 Datasheet

PMBus COMMAND DETAILS

STATUS_WORD

The STATUS_WORD command returns a two-byte summary of the channel's fault condition. The low byte of the STA-
TUS_WORD is the same as the STATUS_BYTE command.
STATUS_WORD High Byte Message Contents:
BIT STATUS BIT NAME
15 VOUT
14 IOUT
13 INPUT
12 MFR_SPECIFIC
11 POWER_GOOD#
10 FANS
9 OTHER
8 UNKNOWN
This command has two data bytes.

STATUS_VOUT

The STATUS_VOUT command returns one byte of V
STATUS_VOUT Message Contents:
BIT MEANING
7 V overvoltage fault.
OUT
6 V overvoltage warning.
OUT
5 V undervoltage warning.
OUT
4 V undervoltage fault.
OUT
3 VOUT_MAX warning.
2 TON_MAX fault.
1 TOFF_MAX warning.
0 Not supported by the LTC3882-1 (returns 0).
ALERT can be asserted if any of bits[7:1] are set. These may be cleared by writing a 1 to their bit position in STATUS_VOUT, in lieu of a CLEAR_FAULTS
command.
This command has one data byte.

STATUS_IOUT

The STATUS_IOUT command returns one byte of I
STATUS_IOUT Message Contents:
BIT MEANING
7 I overcurrent fault.
OUT
6 Not supported (LTC3882-1 returns 0).
5 I overcurrent warning.
OUT
4:0 Not supported (LTC3882-1 returns 0).
ALERT can be asserted if any supported bits are set. Any supported bit may be cleared by writing a 1 to that bit position in STATUS_IOUT, in lieu of a
CLEAR_FAULTS command.
This command has one data byte.
(Status Reporting)
MEANING
An output voltage fault or warning has occurred.
An output current fault or warning has occurred.
An input voltage fault or warning has occurred.
A fault or warning specific to the LTC3882-1 has occurred.
The POWER_GOOD state is false if this bit is set.
Not supported (LTC3882-1 returns 0).
Not supported (LTC3882-1 returns 0).
Not supported (LTC3882-1 returns 0).
status information.
OUT
status information.
OUT
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LTC3882-1
Rev A
87