Rainbow-electronics MAX34440 Manual do Utilizador descarregar pdf (Página 33)

PMBus 6-Channel Power-Supply Manager

MAX34440

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.

1 2 ... 28 29 30 31 32 33 34 35 36 37 38 ... 42 43

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Rainbow-electronics MAX34440 Manual do Utilizador Página 33