ds1876 Maxim Integrated Products, Inc., ds1876 Datasheet - Page 51

• Manufacturer Part Number: ds1876
• Description: Sfp Controller With Dual Ldd Interface
• Manufacturer: Maxim Integrated Products, Inc.

Table 02h, Register 8Dh: RANGING
8Dh
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
A2h AND B2h MEMORY
MEMORY TYPE
The upper nibble of this byte controls the full-scale range of the QT monitoring for BMON1. The lower nibble of
this byte controls the full-scale range for the QT monitoring for PMON1.
RESERVED
BITS 7, 3
BITS 6:4
BITS 2:0
BIT 7
______________________________________________________________________________________
SFP Controller with Dual LDD Interface
RESERVED (default = 0)
HBIAS1
BMON1. Default is 000b and creates a full scale of 1.25V.
TXP1
PMON1. Default is 000b and creates a full scale of 2.5V.
HBIAS1
[2:0]
[2:0]
2
HBIAS1
: TXP1 full-scale ranging: 3-bit value to select the full-scale comparison voltage for
1
TXP1
: HBIAS1 full-scale ranging: 3-bit value to select the full-scale comparison voltage for
000b
001b
010b
011b
100b
101b
110b
111b
000b
001b
010b
011b
100b
101b
110b
111b
00h
PW2 or (PW1 and RWTBL2) or (PW1 and RTBL2)
PW2 or (PW1 and RWTBL2)
Common A2h and B2h memory location
Nonvolatile (SEE)
HBIAS1
[2:0]
[2:0]
1
HBIAS1
0
% OF 1.25V
% OF 2.5V
RESERVED
100.00
100.00
80.03
66.71
50.07
40.08
33.41
28.65
25.08
80.03
66.71
50.07
40.08
33.41
28.65
25.08
TXP1
2
FS VOLTAGE (V)
FS VOLTAGE (V)
TXP1
1.250
1.000
0.834
0.626
0.501
0.418
0.358
0.314
2.507
2.006
1.672
1.255
1.005
0.838
0.718
0.629
1
TXP1
BIT 0
0
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