lm5066pmhx National Semiconductor Corporation, lm5066pmhx Datasheet - Page 36

• Manufacturer Part Number: lm5066pmhx
• Description: High Voltage System Power Management And Protection Ic With Pmbus
• Manufacturer: National Semiconductor Corporation

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Note that a change in the SAMPLES_FOR_AVG register will
not be reflected in the average telemetry measurements until
the present averaging interval has completed. The default
setting for AVGN is 0000, therefore, the average telemetry will
mirror the instantaneous telemetry until a value higher than
zero is programmed.
The SAMPLES_FOR_AVG register is accessed via the PM-
Bus read / write byte protocol.
MFR_SPECIFIC_12: READ_AVG_VIN (DCh)
The READ_AVG_VIN command will report the 12-bit ADC
measured input average voltage. If the data is not ready, the
returned value will be the previous averaged data. However,
if there is no previously averaged data, the default value
(0000h) will be returned. This data is read with the PMBus
Read Word protocol. This register should use the coefficients
shown in the Telemetry and Warning Conversion Coefficients
Table.
MFR_SPECIFIC_13: READ_AVG_VOUT (DDh)
The READ_AVG_VOUT command will report the 12-bit ADC
measured current sense average voltage. The returned value
will be the default value (0000h) or previous data when the
average data is not ready. This data is read with the PMBus
Read Word protocol. This register should use the coefficients
shown in the Telemetry and Warning Conversion Coefficients
Table.
Value
0h – 0Ch
Value
0h – 0FFFh
Value
0h – 0FFFh
AVGN
1001
1010
1011
1100
TABLE 33. SAMPLES_FOR_AVG Register
TABLE 35. READ_AVG_VOUT Register
TABLE 34. READ_AVG_VIN Register
Meaning
Exponent (AVGN)
for number of
samples to
average over
Meaning
Average of
measured values
for input voltage
Meaning
Average of
measured values
for output voltage
N = 2
1024
2048
4096
512
AVGN
Averaging/Register
Update Period (ms)
Default
00h
Default
0000h
Default
0000h
1024
2048
4096
512
36
MFR_SPECIFIC_14: READ_AVG_IIN (DEh)
The READ_AVG_IIN command will report the 12-bit ADC
measured current sense average voltage. The returned value
will be the default value (0000h) or previous data when the
average data is not ready. This data is read with the PMBus
Read Word protocol. This register should use the coefficients
shown in the Telemetry and Warning Conversion Coefficients
Table.
MFR_SPECIFIC_15: READ_AVG_PIN
The READ_AVG_PIN command will report the upper 12-bits
of the average VIN x IIN product as measured by the 12-bit
ADC. You will read the default value (0000h) or previous data
when the average data is not ready. This data is read with the
PMBus Read Word protocol. This register should use the co-
efficients shown in the Telemetry and Warning Conversion
Coefficients Table.
MFR_SPECIFIC_16: BLACK_BOX_READ (E0h)
The BLACK BOX READ command retrieves the BLOCK
READ data which was latched in at the first assertion of SM-
BA by the LM5066. It is re-armed with the CLEAR_FAULTS
command. It is the same format as the BLOCK_READ regis-
ters, the only difference being that its contents are updated
with the SMBA edge rather than the internal clock edge. This
command is read with the PMBus Block Read protocol.
Value
0h – 0FFFh
Value
0h – 0FFFh
TABLE 37. READ_AVG_PIN Register
TABLE 36. READ_AVG_IIN Register
Meaning
Average of
measured values
for current sense
voltage
Meaning
Average of
measured value
for input voltage x
input current sense
voltage
Default
0000h
Default
0000h