DS1886 Datasheet, PDF (62/92 Pages) Maxim Integrated Products – SFP and PON ONU Controller with Digital LDD Interface

DS1886
SFP and PON ONU Controller
with Digital LDD Interface
A2h Table 02h, Register 81h: Temperature Index (TINDEX)
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
MEMORY TYPE
00h
PW2 or (PW1 and RWTBL246) or (PW1 and RBL246)
(PW2 and AEN = 0) or (PW1 and RWTBL246 and AEN = 0)
Volatile
81h
2⁷
2⁶
BIT 7
2⁵
2⁴
2³
2²
2¹
2⁰
BIT 0
Holds the calculated index based on the temperature measurement. This index is used for the address during lookup
of Tables 04h, 06h, and 08h. Temperature measurements below -40NC or above +102NC are clamped to 80h and
C7h, respectively. The calculation of TINDEX is as follows:
= TINDEX ^{Temp_Value + 40°C} + 80h
2°C
For the temperature-indexed LUTs, the index used during the lookup function for each table is as follows:
A2h Table 04h
(MOD)
A2h Table 06h
(APC)
1
TINDEX₆ TINDEX₅ TINDEX₄ TINDEX₃ TINDEX₂ TINDEX₁ TINDEX₀
1
0
TINDEX₆ TINDEX₅ TINDEX₄ TINDEX₃ TINDEX₂ TINDEX₁
A2h Table 02h, Register 82h–83h: MODULATION VALUE
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
MEMORY TYPE
0000h
PW2 or (PW1 and RWTBL246) or (PW1 and RBL246)
(PW2 and MOD LUT EN = 0) or (PW1 and RWTBL246 and MOD LUT EN = 0)
Volatile
82h
0
0
83h
2⁷
2⁶
BIT 7
0
0
0
0
0
2⁸
2⁵
2⁴
2³
2²
2¹
2⁰
BIT 0
The digital value used for MOD and recalled from A2h Table 04h at the adjusted memory address found in TINDEX.
This register is updated at the end of the temperature conversion.
A2h Table 02h, Register 84h: RESERVED
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
MEMORY TYPE
00h
N/A
N/A
Nonvolatile (SEE)
This register is reserved.
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