Datasheet

LTC2974
74
2974fc
For more information www.linear.com/LTC2974
Data Block Contents
PREAMBLE INFORMATION
BYTE
NUMBER
DECIMAL
BYTE
NUMBER
HEX D ATA DESCRIPTION
0 00 Position_last[7:0] = 13 Position of fault-
log pointer when
fault occurred.
1 01 SharedTime[7:0] 41-bit share-
clock counter
value when fault
occurred. Counter
LSB is in 200µs
increments.
2 02 SharedTime[15:8]
3 03 SharedTime[23:16]
4 04 SharedTime[31:24]
5 05 SharedTime[39:32]
6 06 SharedTime[40]
7 07 Mfr_vout_peak0[7:0]
8 08 Mfr_vout_peak0[15:8]
9 09 Mfr_vout_min0[7:0]
10 0A Mfr_vout_min0[15:8]
11 0B Mfr_temperature_
peak0[7:0]
12 0C Mfr_temperature_
peak0[15:8]
13 0D Mfr_temperature_
min0[7:0]
14 0E Mfr_temperature_
min0[15:8]
15 0F Mfr_iout_peak0[7:0]
16 10 Mfr_iout_peak0[15:8]
17 11 Mfr_iout_min0[7:0]
18 12 Mfr_iout_min0[15:8]
19 13 Mfr_vin_peak_[7:0]
20 14 Mfr_vin_peak_[15:8]
21 15 Mfr_vin_min_[7:0]
22 16 Mfr_vin_min_[15:8]
23 17 Mfr_vout_peak1[7:0]
24 18 Mfr_vout_peak1[15:8]
25 19 Mfr_vout_min1[7:0]
26 1A Mfr_vout_min1[15:8]
27 1B Mfr_temperature_
peak1[7:0]
MFR_FAULT_LOG Read Example
The following table fully decodes a sample fault log read
with Position_last = 13 to help clarify the cyclical nature
of the operation.
pMbus coMManD DescripTion
PREAMBLE INFORMATION
BYTE
NUMBER
DECIMAL
BYTE
NUMBER
HEX D ATA DESCRIPTION
28 1C Mfr_temperature_
peak1[15:8]
29 1D Mfr_temperature_
min1[7:0]
30 1E Mfr_temperature_
min1[15:8]
31 1F Mfr_iout_peak1[7:0]
32 20 Mfr_iout_peak1[15:8]
33 21 Mfr_iout_min1[7:0]
34 22 Mfr_iout_min1[15:8]
35 23 Mfr_vout_peak2[7:0]
36 24 Mfr_vout_peak2[15:8]
37 25 Mfr_vout_min2[7:0]
38 26 Mfr_vout_min2[15:8]
39 27 Mfr_temperature_
peak2[7:0]
40 28 Mfr_temperature_
peak2[15:8]
41 29 Mfr_temperature_
min2[7:0]
42 2A Mfr_temperature_
min2[15:8]
43 2B Mfr_iout_peak2[7:0]
44 2C Mfr_iout_peak2[15:8]
45 2D Mfr_iout_min2[7:0]
46 2E Mfr_iout_min2[15:8]
47 2F Mfr_vout_peak3[7:0]
48 30 Mfr_vout_peak3[15:8]
49 31 Mfr_vout_min3[7:0]
50 32 Mfr_vout_min3[15:8]
51 33 Mfr_temperature_
peak3[7:0]
52 34 Mfr_temperature_
peak3[15:8]
53 35 Mfr_temperature_
min3[7:0]
54 36 Mfr_temperature_
min3[15:8]
55 37 Mfr_iout_peak3[7:0]
56 38 Mfr_iout_peak3[15:8]
57 39 Mfr_iout_min3[7:0]
58 3A Mfr_iout_min3[15:8]
59 3B Status_vout0[7:0]