ds1878 Maxim Integrated Products, Inc., ds1878 Datasheet - Page 70
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ds1878
Manufacturer Part Number
ds1878
Description
Sfp+ Controller With Digital Ldd Interface
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
1.DS1878.pdf
(98 pages)
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Table 02h, Register B8h: LOS RANGING
SFP+ Controller with Digital LDD Interface
70
______________________________________________________________________________________
B8h
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
MEMORY TYPE
This register controls the full-scale range of the quick-trip monitoring for the differential inputs of MON3.
RESERVED
BITS 6:4
BITS 2:0
BIT 7
BIT 7
BIT 3
RESERVED (Default = 0)
HLOS[2:0]: HLOS Full-Scale Ranging. 3-bit value to select the FS comparison voltage for high LOS
found on MON3. Default is 000b and creates an FS of 1.25V.
RESERVED (Default = 0)
LLOS[2:0]: LLOS Full-Scale Ranging. 3-bit value to select the FS comparison voltage for low LOS
found on MON3. Default is 000b and creates an FS of 1.25V.
HLOS
HLOS[2:0]
LLOS[2:0]
2
000b
001b
010b
011b
100b
101b
110b
111b
000b
001b
010b
011b
100b
101b
110b
111b
00h
PW2 or (PW1 and RWTBL246) or (PW1 and RTBL246)
PW2 or (PW1 and RWTBL246)
Nonvolatile (SEE)
HLOS
1
% OF 1.25V
% OF 1.25V
HLOS
100.00
100.00
80.00
66.67
50.00
40.00
33.33
28.57
25.00
80.00
66.67
50.00
40.00
33.33
28.57
25.00
0
RESERVED
FS VOLTAGE (V)
FS VOLTAGE (V)
1.250
1.000
0.833
0.625
0.500
0.417
0.357
0.313
1.250
1.000
0.833
0.625
0.500
0.417
0.357
0.313
LLOS
2
LLOS
2
1
LLOS
BIT 0
0
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