LM5056 Datasheet, PDF (24/46 Pages) Texas Instruments – High-Voltage System Power Management Device with PMBus™

LM5056, LM5056A
SNVS827A – OCTOBER 2012 – REVISED APRIL 2013
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STATUS_MFR_SPECIFIC (80h)
The STATUS_MFR_SPECIFIC command is a standard PMBus command that contains manufacturer specific
status information. 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 should be issued.
Table 14. STATUS_MFR_SPECIFIC Definitions
BIT
NAME
DEFAULT
7
Not supported, always 0
0
6
Not supported, always 0
0
5
Not supported, always 0
0
4
Defaults loaded
1
3
Not supported, always 0
0
2
Not supported, always 0
0
1
Not supported, always 0
0
0
Not supported, always 0
0
READ_VIN (88h)
The READ_VIN command is a standard PMBus command that returns the 12-bit measured value of the input
voltage (VIN to AGND). Reading this register should use the coefficients shown in the Table 39. Accesses to this
command should use the PMBus read word protocol. This value is also used internally for the VIN over and
under-voltage warning detection.
VALUE
0h – 0FFFh
Table 15. READ_VIN Register
MEANING
Measured value for VIN
DEFAULT
0000h
READ_VOUT (8Bh)
The READ_VOUT command is a standard PMBus command that returns the 12-bit measured value of the output
voltage. Reading this register should use the coefficients shown in the Table 39 Table. Accesses to this
command should use the PMBus read word protocol. This value is also used internally for the VOUT
under_voltage warning detection.
VALUE
0h – 0FFFh
Table 16. READ_VOUT Register
MEANING
Measured value for VOUT
DEFAULT
0000h
READ_TEMPERATURE_1 (8Dh)
The READ_TEMPERATURE_1 command is a standard PMBus command that returns the signed value of the
temperature measured by the external temperature sense diode. Reading this register should use the coefficients
shown in the Table 39. Accesses to this command should use the PMBus read word protocol. This value is also
used internally for the over-temperature fault and warning detection. This data has a range of -256°C to 255°C
after the coefficients are applied.
VALUE
0h – 0FFFh
Table 17. READ_TEMPERATURE_1 Register
MEANING
Measured value for TEMPERATURE
DEFAULT
0190h
24
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