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MAX34446
PMBus Power-Supply Data Logger
STATUS_CML (7Eh)
The STATUS_CML command returns 1 byte of information with contents as described in Table 13 .
Table 13. STATUS_CML
BIT
7
6
5:1
0
BIT NAME
COMM_FAULT
DATA_FAULT
0
FAULT_LOG_FULL
MEANING
An invalid or unsupported command has been received.
An invalid or unsupported data has been received.
These bits always return a 0.
MFR_NV_FAULT_LOG is full and needs to be cleared.
Note: When NV Fault Log Overwrite is enabled (NV_LOG_OVERWRITE = 1 in MFR_MODE), FAULT_LOG_FULL is set
when the fault log is full, but clears when the fault log is overwritten since two fault logs are cleared before each overwrite.
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 14 .
Table 14. STATUS_MFR_SPECIFIC
BIT
7
6
5
4
3
2
1
0
BIT NAME
LOCKED
OT_WARN
OT_FAULT
WATCHDOG
0
POWER_GOOD#
OC_FAULT
OC_WARN
MEANING
Set when the device is password protected. This is a status-only bit and is not latched.
Overtemperature warning.
Overtemperature fault.
A watchdog reset has occurred.
This bit always returns a 0.
Individual power good has been negated. Only applies to the selected page. This is a status-
only bit and is not latched.
IOUT overcurrent fault.
IOUT overcurrent warning.
READ_VOUT (8Bh)
The READ_VOUT command returns the actual measured remote voltage. The 2 data bytes are in DIRECT format. When
the ENABLE pin is low, this command returns 0000h when read.
READ_IOUT (8Ch)
The READ_IOUT command returns the latest measured current value. The 2 data bytes are in DIRECT format. When
the ENABLE pin is low, this command returns 0000h when read.
READ_TEMPERATURE_1 (8Dh)
The READ_TEMPERATURE_1 command returns the temperature reading. The 2 data bytes are in DIRECT format. When
the ENABLE pin is low, this command returns 0000h when read.
Maxim Integrated
25
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