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PMBus COMMAND DETAILS
Table 20. Fault Logging
This table outlines the format of the block data from a read block data of the MFR_FAULT_LOG command.
Data Format Definitions
DATA
Block Length
HEADER INFORMATION
Fault Log Preface
Fault Source
MFR_REAL_TIME
MFR_VOUT_PEAK (PAGE 0)
MFR_VOUT_PEAK (PAGE 1)
MFR_IOUT_PEAK (PAGE 0)
MFR_IOUT_PEAK (PAGE 1)
MFR_VIN_PEAK
READ_TEMPERATURE1 (PAGE 0)
READ_TEMPERATURE1 (PAGE 1)
READ_TEMPERATURE2
DATA
BITS
FORMAT
BYTE NUM BLOCK READ COMMAND
BYTE
147
[7:0]
ASC
0
[7:0]
1
[15:8]
Reg
2
[7:0]
3
[7:0]
Reg
4
[7:0]
Reg
5
[15:8]
6
[23:16]
7
[31:24]
8
[39:32]
9
[47:40]
10
[15:8]
L16
11
[7:0]
12
[15:8]
L16
13
[7:0]
14
[15:8]
L11
15
[7:0]
16
[15:8]
L11
17
[7:0]
18
[15:8]
L11
19
[7:0]
20
[15:8]
L11
21
[7:0]
22
[15:8]
L11
23
[7:0]
24
[15:8]
L11
25
[7:0]
26
For more information
LIN 11 = PMBus = Rev 1.2, Part 2, section 7.1
LIN 16 = PMBus Rev 1.2, Part 2, section 8. Mantissa portion only
BYTE = 8 bits interpreted per definition of this command
The MFR_FAULT_LOG command is a fixed length of 147 bytes
The block length will be zero if a data log event has not been captured
Returns LTxx beginning at byte 0 if a partial or complete fault log exists.
Word xx is a factory identifier that may vary part to part.
Refer to Table 16.
48 bit share-clock counter value when fault occurred (200µs resolution).
Peak READ_VOUT on Channel 0 since last power-on or CLEAR_PEAKS
command.
Peak READ_VOUT on Channel 1 since last power-on or CLEAR_PEAKS
command.
Peak READ_IOUT on Channel 0 since last power-on or CLEAR_PEAKS
command.
Peak READ_IOUT on Channel 1 since last power-on or CLEAR_PEAKS
command.
Peak READ_VIN since last power-on or CLEAR_PEAKS command.
External temperature sensor 0 during last event.
External temperature sensor 1 during last event.
LTM4700 die temperature sensor during last event.
www.analog.com
LTM4700
Rev. B
117
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