ds1876 Maxim Integrated Products, Inc., ds1876 Datasheet - Page 50

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

SFP Controller with Dual LDD Interface
Table 02h, Register 8Ch: RANGING
50
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8Ch
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 BMON2. The lower nibble of
this byte controls the full-scale range for the QT monitoring for PMON2.
RESERVED
BITS 7, 3
BITS 6:4
BITS 2:0
BIT 7
RESERVED (default = 0)
HBIAS2
BMON2. Default is 000b and creates a full scale of 1.25V.
TXP2
PMON2. Default is 000b and creates a full scale of 2.5V.
HBIAS2
[2:0]
[2:0]
2
HBIAS2
: TXP2 full-scale ranging: 3-bit value to select the full-scale comparison voltage for
2
TXP2
: HBIAS2 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)
HBIAS2
[2:0]
[2:0]
1
HBIAS2
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
TXP2
2
FS VOLTAGE (V)
FS VOLTAGE (V)
TXP2
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
TXP2
BIT 0
0