lm5066pmhx National Semiconductor Corporation, lm5066pmhx Datasheet - Page 37

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

MFR_SPECIFIC_17: READ_DIAGNOSTIC_WORD (E1h)
The READ_DIAGNOSTIC_WORD PMBus command will re-
port all of the LM5066 faults and warnings in a single read
operation. The standard response to the assertion of the SM-
BA signal of issuing multiple read requests to various status
registers can be replaced by a single word read to the
MFR_SPECIFIC_18: AVG_BLOCK_READ (E2h)
The AVG_BLOCK_READ command concatenates the
DIAGNOSTIC_WORD with input and output average teleme-
try information (IIN, VOUT, VIN, PIN) as well as temperature
to capture all of the operating information of the part in a single
PMBus transaction. The block is 12 bytes long with telemetry
information being sent out in the same manner as if an indi-
vidual READ_AVG_XXX command had been issued (shown
below). AVG_BLOCK_READ also guarantees that the VIN,
VOUT, and IIN measurements are all time-aligned whereas
there is a chance they may not be if read with individual PM-
Bus commands. To read data from the AVG_BLOCK_READ
command, use the SMBus Block Read protocol.
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
TABLE 38. DIAGNOSTIC_WORD Format
VOUT_UNDERVOLTAGE_WARN
OVER_TEMPERATURE_FAULT
OVER_TEMPERATURE_WARN
VIN_UNDERVOLTAGE_FAULT
VIN_UNDERVOLTAGE_WARN
VIN_OVERVOLTAGE_FAULT
VIN_OVERVOLTAGE_WARN
CIRCUIT_BREAKER_FAULT
EXT_MOSFET_SHORTED
IIN_OC/PFET_OP_FAULT
TIMER_LATCHED_OFF
CONFIG_PRESET
POWER GOOD
IIN_OP_WARN
DEVICE_OFF
CML_FAULT
Meaning
37
DIAGNOSTIC_WORD
READ_DIAGNOSTIC_WORD command should be read with
the
READ_DIAGNOSTIC_WORD is also returned in the
BLOCK_READ,
AVG_BLOCK_READ operations.
DIAGNOSTIC_W
TEMPERATURE
AVG_VOUT
TABLE 39. AVG_BLOCK_READ Register Format
(always 12)
Byte Count
AVG_VIN
AVG_PIN
AVG_IIN
ORD
PMBus
Read
BLACK_BOX_READ,
Word
register.
(1 word)
(1 word)
(1 word)
(1 word)
(1 word)
(1 word)
Default
(1 byte)
0
0
0
0
1
0
0
0
1
1
1
0
0
0
0
0
protocol.
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