Status_mfr_specific (80h), Status_fans_1_2 (81h), Read_vout (8bh) – Rainbow Electronics MAX34441 User Manual
Page 37: Read_iout (8ch), Read_temperature_1 (8dh), Table 24. status_mfr_specific, Table 25. status_fans_1_2

PMBus 5-Channel Power-Supply Manager
and Intelligent Fan Controller
MAX34441
37
STATUS_MFR_SPECIFIC (80h)
The STATUS_MFR_SPECIFIC command returns 1 byte of information with a summary of the reason for a fault. The
STATUS_MFR_SPECIFIC message content is described in Table 24.
STATUS_FANS_1_2 (81h)
The STATUS_FANS_1_2 command returns 1 byte of information with the status of the fan. The STATUS_FANS_1_2
command is described in Table 25.
READ_VOUT (8Bh)
The READ_VOUT command returns the actual measured (not commanded) output voltage. READ_VOUT is measured
and updated every 5ms. The 2 data bytes are in DIRECT format.
READ_IOUT (8Ch)
The READ_IOUT command returns the latest measured current value. READ_IOUT is measured and updated every
200ms. The 2 data bytes are in DIRECT format.
READ_TEMPERATURE_1 (8Dh)
The READ_TEMPERATURE_1 command returns the temperature returned from the temperature sensor. The value of
READ_TEMPERATURE_1 does not have offset from MFR_TEMP_SENSOR_CONFIG added. READ_TEMPERATURE_1
returns 7FFFh if the sensor is faulty and 0000h if the sensor is disabled. READ_TEMPERATURE_1 is measured and
updated once a second. The 2 data bytes are in DIRECT format.
Table 24. STATUS_MFR_SPECIFIC
Note: The settings of the OFF and POWER_GOOD# bits do not assert the ALERT signal.
Table 25. STATUS_FANS_1_2
BIT
BIT NAME
MEANING
7
OFF
This bit is set if the power supply is off (due to either a fault or sequencing delay; this bit is
not set if the power supply is disabled).
6
OT_WARN
Overtemperature warning.
5
OT_FAULT
Overtemperature fault.
4
WATCHDOG
A watchdog reset has occurred.
3
MARGIN_FAULT
This bit is set if the device cannot properly close-loop margin the power supply.
2
POWER_GOOD#
Power-supply voltage has fallen from POWER_GOOD_ON to less than POWER_GOOD_OFF.
1
OC_FAULT
IOUT overcurrent fault.
0
OC_WARN
IOUT overcurrent warning.
BIT
BIT NAME
MEANING
7
FAN_1_FAULT
Fan 1 fault.
6
0
This bit always returns a 0.
5
FAN_1_WARN
Fan 1 warning.
4:0
0
These bits always return a 0.