MAX34446EVKIT#【PDF 31/36 页】KIT EVAL FOR MAX34446

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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

PARAMETER

BYTE

PARAMETER

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

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

128

130

132

134

136

138

140

142

144

146

148

150

152

154

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166

168

170

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188

190

DATA

DATA

DATA

DATA

DATA

DATA

DATA

DATA

DATA

DATA

DATA

DATA

DATA

DATA

DATA

DATA

DATA

DATA

DATA

DATA

DATA

DATA

DATA

DATA

DATA

DATA

DATA

DATA

DATA

DATA

DATA

DATA

BUFFER

BUFFER

BUFFER

BUFFER

BUFFER

BUFFER

BUFFER

BUFFER

BUFFER

BUFFER

BUFFER

BUFFER

BUFFER

BUFFER

BUFFER

BUFFER

BUFFER

BUFFER

BUFFER

BUFFER

BUFFER

BUFFER

BUFFER

BUFFER

BUFFER

BUFFER

BUFFER

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BUFFER

34

35

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65

64

DATA BUFFER 2

192

DATA BUFFER 66

Maxim Integrated

31

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