MAX34446_12 Datasheet, PDF (31/36 Pages) Maxim Integrated Products – PMBus Power-Supply Data Logger

MAX34446
PMBus Power-Supply Data Logger
If the device is not enabled to measure either current or voltage, or if a temperature sensor is disabled, the associated
fault-log byte position returns 0000h.
There is a FAULT_LOG_COUNT (16-bit counter) at the beginning of each fault log that indicates which fault log is
the latest. This counter rolls over should more than 65,535 faults be logged. This counter is not cleared when the
CLEAR_NV_FAULT_LOG bit in MFR_MODE is toggled. Table 19 describes the 255 bytes returned by the
MFR_NV_FAULT_LOG command.
USER NOTE: V_DD must be above 2.9V for the device to clear or log data into MFR_NV_FAULT_LOG. During
a write to the fault log, the device temporarily stops monitoring and does not respond to SMBus commands.
Table 19. MFR_NV_FAULT_LOG
BYTE
0
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50
52
54
56
58
60
62
64
PARAMETER
00h/FAULT_LOG_INDEX
FAULT_LOG_COUNT
MFR_TIME_COUNT (LSW)
MFR_TIME_COUNT (MSW)
STATUS_BYTE / STATUS_CML
STATUS_WORD
STATUS_VOUT Pages 0/1
STATUS_VOUT Pages 1/2
STATUS_MFR_SPECIFIC Pages 0/1
STATUS_MFR_SPECIFIC Pages 2/3
STATUS_MFR_SPECIFIC Pages 4/5
STATUS_MFR_SPECIFIC Page 6/00h
RESERVED (0000h)
RESERVED (0000h)
RESERVED (0000h)
CURRENT_CHANNELS/00h (Note 1)
READ_VOUT or IOUT Page 0
READ_VOUT or IOUT Page 1
READ_VOUT or IOUT Page 2
READ_VOUT or IOUT Page 3
MFR_VOUT or IOUT PEAK Page 0
MFR_VOUT or IOUT PEAK Page 1
MFR_VOUT or IOUT PEAK Page 2
MFR_VOUT or IOUT PEAK Page 3
MFR_VOUT_MIN or IOUTAVG Page 0
MFR_VOUT_MIN or IOUTAVG Page 1
MFR_VOUT_MIN or IOUTAVG Page 2
MFR_VOUT_MIN or IOUTAVG Page 3
RESERVED (0000h)
BUFFER INDEX/NUMBER_OF_CH (Notes 2, 3)
DATA BUFFER 0
DATA BUFFER 1
DATA BUFFER 2
BYTE
128
130
132
134
136
138
140
142
144
146
148
150
152
154
156
158
160
162
164
166
168
170
172
174
176
178
180
182
184
186
188
190
192
PARAMETER
DATA BUFFER 34
DATA BUFFER 35
DATA BUFFER 36
DATA BUFFER 37
DATA BUFFER 38
DATA BUFFER 39
DATA BUFFER 40
DATA BUFFER 41
DATA BUFFER 42
DATA BUFFER 43
DATA BUFFER 44
DATA BUFFER 45
DATA BUFFER 46
DATA BUFFER 47
DATA BUFFER 48
DATA BUFFER 49
DATA BUFFER 50
DATA BUFFER 51
DATA BUFFER 52
DATA BUFFER 53
DATA BUFFER 54
DATA BUFFER 55
DATA BUFFER 56
DATA BUFFER 57
DATA BUFFER 58
DATA BUFFER 59
DATA BUFFER 60
DATA BUFFER 61
DATA BUFFER 62
DATA BUFFER 63
DATA BUFFER 64
DATA BUFFER 65
DATA BUFFER 66
Maxim Integrated
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