Datasheet

DS1886
SFP and PON ONU Controller
with Digital LDD Interface
63Maxim Integrated
A2h Table 02h, Register 85h: APC VALUE
A2h Table 02h, Register 86h–87h: SET_IBIAS VALUE
A2h Table 02h, Register 88h: DACFS
FACTORY DEFAULT 0000h
READ ACCESS PW2 or (PW1 and RWTBL246) or (PW1 and RBL246)
WRITE ACCESS (PW2 and APC LUT EN = 0) or (PW1 and RWTBL246 and APC LUT EN = 0)
MEMORY TYPE Volatile
85h 2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
BIT 7 BIT 0
The digital value used for APC and recalled from A2h Table 06h in the APC and dual-closed-loop mode at the
adjusted memory address found in TINDEX. This register is updated at the end of the temperature conversion.
FACTORY DEFAULT 0000h
READ ACCESS PW2 or (PW1 and RWTBL246) or (PW1 and RBL246)
WRITE ACCESS (PW2 and APC LUT EN = 0) or (PW1 and RWTBL246 and APC LUT EN = 0)
MEMORY TYPE Volatile
86h 0 0 0 0 0 0 2
9
2
8
87h 2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
BIT 7 BIT 0
The digital value used for BIAS and recalled from A2h Table 06h in the open-loop mode at the adjusted memory
address found in TINDEX. This register is updated at the end of the temperature conversion.
FACTORY DEFAULT FFh
READ ACCESS PW2 or (PW1 and RWTBL246) or (PW1 and RBL246)
WRITE ACCESS PW2 or (PW1 and RWTBL246)
MEMORY TYPE Nonvolatile (SEE)
88h 2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
2
BIT 7 BIT 0
DACFS sets the slope of the DAC’s temperature compensation. In conjunction with DAC OFFSET and TINDEX,
this allows the DAC to create an output that is linearly dependent on temperature. For further details see the Delta-
Sigma Output and Reference section.