Rainbow-electronics MAX34440 Bedienungsanleitung PDF herunterladen (Seite 32)

PMBus 6-Channel Power-Supply Manager

MAX34440

Table 16. STATUS_BYTE

STATUS_BYTE (78h)

The STATUS_BYTE command returns 1 byte of information with a summary of the most critical faults. A value of 1 indi-

cates that a fault or warning event has occurred and a 0 indicates otherwise. Bits for unsupported features are reported

as 0. The STATUS_BYTE cannot be restored by the RESTORE_DEFAULT_ALL command. The STATUS_BYTE message

content is described in Table 16. This command is read-only.

Table 17. STATUS_WORD

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 17 describes the STATUS_WORD message content.

BIT BIT NAME MEANING

7:6 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

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.

10:6 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.

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Rainbow-electronics MAX34440 Bedienungsanleitung Seite 32