Rainbow Electronics MAX34440 - Manual (Page 33)

PMBus 6-Channel Power-Supply Manager
MAX34440
33
STATUS_VOUT (7Ah)
The STATUS_VOUT command returns 1 byte of information with contents as described in Table 18.
STATUS_CML (7Eh)
The STATUS_CML command returns 1 byte of information with contents as described in Table 19.
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 20.
Note: The settings of the OFF and POWER_GOOD# bits do not assert the ALERT signal.
Table 20. STATUS_MFR_SPECIFIC
Table 19. STATUS_CML
Table 18. STATUS_VOUT
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 COMM_FAULT An invalid or unsupported command has been received.
6 DATA_FAULT An invalid or unsupported data has been received.
5:1 0 These bits always return a 0.
0 FAULT_LOG_FULL MFR_NV_FAULT_LOG is full and needs to be cleared.
BIT BIT NAME MEANING
7 VOUT_OV_FAULT VOUT overvoltage fault.
6 VOUT_OV_WARN VOUT overvoltage warning.
5 VOUT_UV_WARN VOUT undervoltage warning.
4 VOUT_UV_FAULT VOUT undervoltage fault.
3 0 This bit always returns a 0.
2 TON_MAX_FAULT TON maximum fault.
1:0 0 These bits always return a 0.