Datasheet

DS1886
SFP and PON ONU Controller
with Digital LDD Interface
88Maxim Integrated
A2h Table 04h, Register F8h–FFh: MOD OFFSET or SET_IMOD LUT
A2h Table 06h Register Descriptions
A2h Table 06h, Register 80h–A7h: BIAS or SET_IBIAS
FACTORY DEFAULT 00h
READ ACCESS PW2 or (PW1 and RWTBL246) or (PW1 and RBL246)
WRITE ACCESS PW2 or (PW1 and RWTBL246)
MEMORY TYPE Nonvolatile (EE)
Open Loop, APC Loop, and Dual Closed Loop (SET_IMOD)
F8h–FFh 2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
2
BIT 7 BIT 0
FACTORY DEFAULT 00h
READ ACCESS PW2 or (PW1 and RWTBL246) or (PW1 and RBL246)
WRITE ACCESS PW2 or (PW1 and RWTBL246)
MEMORY TYPE Nonvolatile (EE)
Open Loop
80h–A7h 2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
APC Loop and Dual Closed Loop
80h–A7h 2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
2
BIT 7 BIT 0
The BIAS LUT is a set of registers assigned to hold the temperature profile for the BIAS reference DAC. The
temperature measurement is used to index the LUT (TINDEX, A2h Table 02h, Register 81h) in 2NC increments.
Values recalled from this EEPROM memory table are written into the BIAS or SET_IBIAS location, which holds the
value until the next temperature conversion. The part can be placed into a manual mode, where BIAS or SET_IBIAS
can be directly controlled for calibration. If TE temperature compensation is not required by the application,
program the entire LUT to the desired BIAS value.