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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

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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.