ltc2978 Linear Technology Corporation, ltc2978 Datasheet - Page 32

• Manufacturer Part Number: ltc2978
• Description: Octal Pmbus Power Supply Monitor And Controller With Eeprom
• Manufacturer: Linear Technology Corporation

STATUS_VOUT
The STATUS_VOUT command returns the summary of
the voltage faults or warnings which have occurred, as
shown in the following table:
STATUS_VOUT Data Contents
STATUS_INPUT
The STATUS_INPUT command returns the summary of
the V
in the following table:
STATUS_INPUT Data Contents
LTC2978
operaTion

BIT(S) SYMBOL
BIT(S) SYMBOL
b[7]
b[6]
b[5]
b[4]
b[3]
b[2]
b[1]
b[0]
b[7]
b[6]
b[5]
b[4]
b[3]
b[2]
b[1]
b[0]
IN
Status_vout_ov_fault
Status_vout_ov_warn
Status_vout_uv_warn
Status_vout_uv_fault
Status_vout_max_fault
Status_vout_ton_max_fault TON_MAX_FAULT sequencing
Status_vout_toff_max_warn Not supported. Always returns 0.
Status_vout_tracking_error
Status_input_ov_fault
Status_input_ov_warn
Status_input_uv_warn
Status_input_uv_fault
Status_input_off
I
I
PIN overpower warn
faults or warnings which have occurred, as shown
IN
IN
overcurrent fault
overcurrent warn
OPERATION
V
V
V
V
Unit is off for insufficient input voltage.
Not supported. Always returns 0.
Not supported. Always returns 0.
Not supported. Always returns 0.
IN
IN
IN
IN
Overvoltage fault
Overvoltage warning
Undervoltage warning
Undervoltage fault
OPERATION
Overvoltage fault.
Overvoltage warning.
Undervoltage warning
Undervoltage fault.
VOUT_MAX fault. An attempt
has been made to set the output
voltage to a value higher than
allowed by the VOUT_MAX
command.
fault.
Not supported. Always returns 0.
STATUS_TEMPERATURE
The STATUS_TEMPERATURE command returns the sum-
mary of the temperature faults or warnings which have
occurred, as shown in the following table:
STATUS_TEMPERATURE Data Contents
STATUS_CML
The STATUS_CML command returns the summary of the
communication, memory and logic faults or warnings
which have occurred, as shown in the following table:
STATUS_CML Data Contents
BIT(S) SYMBOL
Bit(s) Symbol
b[7]
b[6]
b[5]
b[4]
b[3]
b[2]
b[1]
b[0]
b[7]
b[6]
b[5]
b[4]
b[3]
b[2]
b[1]
b[0]
Status_temperature_ot_fault
Status_temperature_ot_warn
Status_temperature_ut_warn
Status_temperature_ut_fault
Reserved
Reserved
Reserved
Reserved
Status_cml_cmd_fault
Status_cml_data_fault
Status_cml_pec_fault
Status_cml_memory_fault
Status_cml_processor_fault Not supported, always returns 0.
Reserved
Status_cml_PMBus_fault
Status_cml_unknown_fault
OPERATION
1 = An illegal or unsupported
command fault has occurred.
0 = No fault has occurred.
1 = Illegal or unsupported data
received.
0 = No fault has occurred.
1 = A PEC fault has occurred.
0 = No fault has occurred.
1 = A fault has occurred in the
NVM.
0 = No fault has occurred.
Not supported, always returns 0.
1 = A communication fault other
than ones listed in this table has
occurred.
0 = No fault has occurred.
Not supported, always returns 0.
Operation
Overtemperature fault.
Overtemperature warning.
Undertemperature warning.
Undertemperature fault.
Reserved. Always returns 0.
Reserved. Always returns 0.
Reserved. Always returns 0.
Reserved. Always returns 0.
2978fa