lm25066apsqx National Semiconductor Corporation, lm25066apsqx Datasheet - Page 33

• Manufacturer Part Number: lm25066apsqx
• Description: Lm25066a System Power Management And Protection Ic With Pmbus
• Manufacturer: National Semiconductor Corporation

STATUS_TEMPERATURE
The STATUS TEMPERATURE is a standard PMBus ™ com-
mand that returns the value of the of a number of flags related
to the temperature telemetry value. Accesses to this com-
STATUS_CML
The STATUS CML is a standard PMBus ™ command that re-
turns the value of a number of flags related to communication
STATUS_MFR_SPECIFIC
The STATUS_MFR_SPECIFIC command, is a standard PM-
Bus ™ command that contains manufacturer specific status
information. Accesses to this command should use the PM-
Bus ™ read byte protocol. To clear bits in this register, the
underlying fault should be cleared and a CLEAR FAULTS
command should be issued.
READ_VIN
The READ VIN is a standard PMBus ™ command that returns
the 12 bit measured value of the input voltage. Reading this
register should use the coefficients shown in the Telemetry
and Warning Conversion Coefficients Table. Accesses to this
command should use the PMBus ™ read word protocol. This
value is also used internally for the VIN Over and Under Volt-
age Warning detection.
Bit
Bit
7
6
5
4
3
2
1
0
TABLE 15. STATUS_MFR_SPECIFIC Definitions
7
6
5
4
3
2
1
0
Bit
7
6
5
4
3
2
1
0
Ext. MOSFET shorted fault
Not Supported, Always 0
Not supported: Always 0
Not supported: Always 0
Not supported: Always 0
Not supported: Always 0
Circuit breaker fault
Defaults loaded
Meaning
Undertemp Warn
Undertemp Fault
Overtemp Warn
Overtemp Fault
Other memory or logic fault detected Not supported, always 0
reserved
reserved
reserved
reserved
NAME
Processor Fault Detected Not supported, always 0
Miscellaneous communications fault has occurred
Memory Fault Detected Not supported, always 0
Invalid or unsupported command received
TABLE 13. STATUS TEMPERATURE Definitions
Invalid or unsupported data received
Reserved Not supported, always 0
TABLE 14. STATUS CML Definitions
Packet Error Check failed
Default
0
0
0
1
0
0
0
0
NAME
An Overtemperature Warning has occurred
33
An Overtemperature Fault has occurred
mand should use the PMBus ™ read byte protocol. To clear
bits in this register, the underlying fault should be cleared and
a CLEAR FAULTS command issued.
faults. Accesses to this command should use the PMBus ™
read byte protocol. To clear bits in this register, a CLEAR
FAULTS command should be issued.
Value
0h – 0FFFh
Not Supported, always 0
Not Supported, always 0
Not Supported, always 0
Not Supported, always 0
Not Supported, always 0
Not Supported, always 0
Meaning
TABLE 16. Read VIN Register
Meaning
Measured value
for VIN
Default
0000h
Default
0
0
0
0
0
0
0
0
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Default
0
0
0
0
0
0
0
0