ds1878 Maxim Integrated Products, Inc., ds1878 Datasheet - Page 65

• Manufacturer Part Number: ds1878
• Description: Sfp+ Controller With Digital Ldd Interface
• Manufacturer: Maxim Integrated Products, Inc.

Table 02h, Register 8Fh: RIGHT-SHIFT 0 (RSHIFT 0 )
Table 02h, Register 90h–91h: XOVER COARSE
90h
91h
8Fh
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
MEMORY TYPE
Defines the crossover value for RSSI measurements of nonlinear inputs when XOVEREN is set to 1 (Table 02h,
Register 8Bh). MON3 coarse conversion results (before right-shifting) less than this register are clamped to the
value of this register.
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
MEMORY TYPE
Allows for right-shifting the final answer of MON3 coarse (MON3C) and MON3 fine (MON3F) 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.
SFP+ Controller with Digital LDD Interface
RESERVED
BIT 7
BIT 7
2
2
______________________________________________________________________________________
15
7
MON3C
2
2
14
6
2
0000h
PW2 or (PW1 and RWTBL2) or (PW1 and RTBL2)
PW2 or (PW1 and RWTBL2)
Nonvolatile (SEE)
30h
PW2 or (PW1 and RWTBL246) or (PW1 and RTBL246)
PW2 or (PW1 and RWTBL246)
Nonvolatile (SEE)
MON3C
2
2
13
5
1
MON3C
2
2
12
4
0
RESERVED
2
2
11
3
MON3F
2
2
10
2
2
MON3F
2
2
9
1
1
MON3F
BIT 0
BIT 0
2
0
8
0
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