lm25066apsqx National Semiconductor Corporation, lm25066apsqx Datasheet - Page 34

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

www.national.com
READ_VOUT
The READ VOUT is a standard PMBus ™ command that re-
turns the 12 bit measured value of the output voltage. Reading
this register should use the coefficients shown in the Teleme-
try and Warning Conversion Coefficients 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.
READ_TEMPERATURE_1
The READ TEMPERATURE is a standard PMBus ™ com-
mand that returns the signed value of the temperature mea-
sured by the external temperature sense diode. 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 Over Temperature Fault
and Warning detection. This data has a range of -256°C to +
255°C after the coefficients are applied.
MFR_ID
The MANUFACTURER ID is a standard PMBus ™ command
that returns the identification of the manufacturer. To read the
MANUFACTURER ID, use the PMBus ™ block read protocol.
MFR_MODEL
The MANUFACTURER MODEL is a standard PMBus ™ com-
mand that returns the part number of the chip. To read the
MANUFACTURER MODEL, use the PMBus ™ block read
protocol.
MFR_REVISION
Value
0h – 0FFFh
Value
0h – 0FFFh
Byte
TABLE 20. MANUFACTURER MODEL Register
0
1
2
3
Byte
TABLE 19. MANUFACTURER ID Register
TABLE 18. Read Temperature Register
0
1
2
3
4
5
6
7
8
TABLE 17. Read VOUT Register
Number of bytes
Meaning
Measured value
for VOUT
Meaning
Measured value
for
TEMPERATURE
MFR ID-1
MFR ID-2
MFR ID-3
Number of bytes
Name
MFR ID-1
MFR ID-2
MFR ID-3
MFR ID-4
MFR ID-5
MFR ID-6
MFR ID-7
MFR ID-8
Name
Default
0000h
Default
0000h
4Dh ‘M’
4Eh ‘N’
4Ch ‘C’
53h ‘S’
4Ch ‘L’
32h ‘2’
35h ‘5’
30h ‘0’
36h ‘6’
36h ‘6’
Value
Value
03h
08h
00h
34
The MANUFACTURER REVISION is a standard PMBus™
command that returns the revision level of the part. To read
the MANUFACTURER REVISION, use the PMBus™ block
read protocol.
Manufacturer Specific PMBus™
Commands
MFR_SPECIFIC_00: READ_AUX
The READ AUX command will report the 12-bit ADC mea-
sured auxiliary voltage. Voltages greater than or equal to
1.16V 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). Coefficients for the AUX value are de-
pendant on the value of the external divider (if used). To read
data from the MFR READ AUX command, use the PMBus™
Read Word protocol.
Byte
0
1
2
Value
0h – 0FFFh
TABLE 21. MANUFACTURER REVISION Register
TABLE 22. MFR READ AUX Register
Name
Number of bytes
MFR ID-1
MFR ID-2
Meaning
Measured value
for AUX input
Value
02h
41h ‘A’
41h ‘A’
Default
0000h