Rainbow Electronics MAX34441 - Manual (Page 36)

PMBus 5-Channel Power-Supply Manager
and Intelligent Fan Controller
MAX34441
36
STATUS_WORD (79h)
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 21 describes the STATUS_WORD message content.
STATUS_VOUT (7Ah)
The STATUS_VOUT command returns 1 byte of information with contents as described in Table 22.
STATUS_CML (7Eh)
The STATUS_CML command returns 1 byte of information with contents as described in Table 23.
Table 21. STATUS_WORD
Table 23. STATUS_CML
Table 22. STATUS_VOUT
BIT BIT NAME MEANING
15 VOUT An output voltage fault or warning or TON_MAX_FAULT has occurred.
14 IOUT An overcurrent fault or warning has occurred.
13 0 This bit always returns a 0.
12 MFR A bit in STATUS_MFR_SPECIFIC has been set.
11 POWER_GOOD# A power-supply voltage has fallen from POWER_GOOD_ON to less than POWER_GOOD_OFF.
10 FANS A fan fault has occurred.
9:6 0 These bits always return a 0.
5 VOUT_OV An overvoltage fault has occurred.
4 IOUT_OC An overcurrent fault has occurred.
3 0 This bit always returns a 0.
2 TEMPERATURE A temperature fault or warning has occurred.
1 CML A communication, memory, or logic fault has occurred.
0 NONE OF THE ABOVE A fault or warning not listed in bits [7:1] has occurred.
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.