Datasheet

LM25066I, LM25066IA
SNVS824C –JUNE 2012–REVISED MARCH 2013 www.ti.com
Table 10. STATUS_WORD Definitions (continued)
Bit NAME Meaning Default
1 CML A Communication Fault has occurred 0
0 None of the Above A fault or warning not listed in bits [7:1] has occurred 1
STATUS_VOUT (7Ah)
The STATUS_VOUT command is a standard PMBus
™
command that returns the value of the VOUT UV Warning
flag. Accesses to this command should use the PMBus
™
read byte protocol. To clear bits in this register, the
underlying fault should be removed and a CLEAR_FAULTS command issued.
Table 11. STATUS_VOUT Definitions
Bit NAME Meaning Default
7 VOUT OV Fault Not Supported, always 0 0
6 VOUT OV Warn Not Supported, always 0 0
5 VOUT UV Warn A VOUT Under-voltage Warning has occurred 0
4 VOUT UV Fault Not Supported, always 0 0
3 VOUT Max Not Supported, always 0 0
2 TON Max Fault Not Supported, always 0 0
1 TOFF Max Fault Not Supported, always 0 0
0 VOUT Tracking Error Not Supported, always 0 0
STATUS_INPUT (7Ch)
The STATUS_INPUT command is a standard PMBus
™
command that returns the value of a number of flags
related to input voltage, current, and power. Accesses to this command should use the PMBus
™
read byte
protocol. To clear bits in this register, the underlying fault should be removed and a CLEAR_FAULTS command
issued. The VIN UV Warn flag will default to 1 on startup. However, it will be cleared to 0 after the first time the
input voltage exceeds the resistor programmed UVLO threshold.
Table 12. STATUS_INPUT Definitions
Bit NAME Meaning Default
7 VIN OV Fault A VIN Over-voltage Fault has occurred 0
6 VIN OV Warn A VIN Over-voltage Warning has occurred 0
5 VIN UV Warn A VIN Under-voltage Warning has occurred 1
4 VIN UV Fault A VIN Under-voltage Fault has occurred 0
3 Insufficient Voltage Not Supported, always 0 0
2 IIN OC Fault An IIN Over-current Fault has occurred 0
1 IIN OC Warn An IIN Over-current Warning has occurred 0
0 PIN OP Warn A PIN Over-power Warning has occurred 0
STATUS_TEMPERATURE (7Dh)
The STATUS_TEMPERATURE is a standard PMBus
™
command that returns the value of the of a number of
flags related to the temperature telemetry value. Accesses to this command should use the PMBus
™
read byte
protocol. To clear bits in this register, the underlying fault should be removed and a CLEAR_FAULTS command
issued.
Table 13. STATUS_TEMPERATURE Definitions
Bit NAME Meaning Default
7 Overtemp Fault An Overtemperature Fault has occurred 0
6 Overtemp Warn An Overtemperature Warning has occurred 0
5 Undertemp Warn Not Supported, always 0 0
4 Undertemp Fault Not Supported, always 0 0
3 reserved Not Supported, always 0 0
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