Datasheet

LM5066

SNVS655G –JUNE 2011–REVISED FEBRUARY 2013

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MANUFACTURER SPECIFIC PMBUS™ COMMANDS

MFR_SPECIFIC_00: READ_VAUX (D0h)

The READ_VAUX command will report the 12-bit ADC measured auxiliary voltage. Voltages greater than or

equal to 2.97V to ground will be reported at plus full scale (0FFFh). Voltages less than or equal to 0V referenced

to ground will be reported as 0 (0000h). To read data from the READ_VAUX command, use the PMBus Read

Word protocol.

Table 22. READ_VAUX Register

Value Meaning Default

0h – 0FFFh Measured value for VAUX input 0000h

MFR_SPECIFIC_01: MFR_READ_IIN (D1h)

The MFR_READ_IIN command will report the 12-bit ADC measured current sense voltage. To read data from

the MFR_READ_IIN command, use the PMBus Read Word protocol. Reading this register should use the

coefficients shown in Table 41. Please see the section on coefficient calculations to calculate the values to use.

Table 23. MFR_READ_IIN Register

Value Meaning Default

0h – 0FFFh Measured value for input current sense 0000h

voltage

MFR_SPECIFIC_02: MFR_READ_PIN (D2h)

The MFR_READ_PIN command will report the upper 12 bits of the VIN x IIN product as measured by the 12-bit

ADC. To read data from the MFR_READ_PIN command, use the PMBus Read Word protocol. Reading this

calculate the values to use.

Table 24. MFR_READ_PIN Register

Value Meaning Default

0h – 0FFFh Value for input current x input voltage 0000h

MFR_SPECIFIC_03: MFR_IN_OC_WARN_LIMIT (D3h)

The MFR_IIN_OC_WARN_LIMIT PMBus command sets the input over-current warning threshold. In the event

that the input current rises above the value set in this register, the IIN Over-current flags are set in the respective

registers and the SMBA is asserted. To access the MFR_IIN_OC_WARN_LIMIT register, use the PMBus

Read/Write Word protocol. Reading/writing to this register should use the coefficients shown in Table 41.

Table 25. MFR_IIN_OC_WARN_LIMIT Register

Value Meaning Default

0h – 0FFEh Value for input over-current warn limit 0FFFh

0FFFh Input over-current warning disabled n/a

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