Datasheet

DS1886
SFP and PON ONU Controller
with Digital LDD Interface
68Maxim Integrated
A2h Table 02h, Register 8Fh: RIGHT-SHIFT
0
(RSHIFT
0
)
A2h Table 02h, Register 90h–91h: XOVER COARSE
FACTORY DEFAULT 30h
READ ACCESS PW2 or (PW1 and RWTBL246) or (PW1 and RBL246)
WRITE ACCESS PW2 or (PW1 and RWTBL246)
MEMORY TYPE Nonvolatile (SEE)
8Fh RESERVED RSSIF
2
RSSIF
1
RSSIF
0
RESERVED RSSIC
2
RSSIC
1
RSSIC
0
BIT 7 BIT 0
Allows for right-shifting the final answer of RSSI fine and coarse voltage measurements. This allows for scaling the
measurements to the smallest full-scale voltage and then right-shifting the final result so the reading is weighted to
the correct LSB.
FACTORY DEFAULT 0000h
READ ACCESS PW2 or (PW1 and RWTBL2) or (PW1 and RTBL2)
WRITE ACCESS PW2 or (PW1 and RWTBL2)
MEMORY TYPE Nonvolatile (SEE)
90h 2
15
2
14
2
13
2
12
2
11
2
10
2
9
2
8
91h 2
7
2
6
2
5
2
4
2
3
2
2
2
1
0
BIT 7 BIT 0
Defines the crossover value for RSSI measurements of nonlinear inputs when XOVEREN is set to a 1 (A2h Table
02h, Register 8Bh). RSSI coarse conversion results (before right-shifting) less than this register are clamped to the
value of this register.