Datasheet

DS1878
SFP+ Controller with Digital LDD Interface
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Table 02h, Register C4h: DAC2TI
FACTORY DEFAULT 00h
READ ACCESS PW2 or (PW1 and RWTBL246) or (PW1 and RTBL246)
WRITE ACCESS PW2 or (PW1 and RWTBL246)
MEMORY TYPE Nonvolatile (SEE)
C4h 2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
BIT 7 BIT 0
DAC2 temperature index defines the TempCo boundary for the DAC2 LUT. The DAC2TC bit (Table 02h, Register
C6h) defines the polarity of the TempCo. This value is compared with the adjusted memory address used during
the LUT recall, not the value in the TINDEX register (Table 02h, Register 81h).
DAC2TI =
Temp _ Value + 40°C
4°C
+ 80h
FACTORY DEFAULT 00h
READ ACCESS PW2 or (PW1 and RWTBL246) or (PW1 and RTBL246)
WRITE ACCESS PW2 or (PW1 and RWTBL246)
MEMORY TYPE Nonvolatile (SEE)
Determines which value between ISTEPH and ISTEPL is used as the ISTEP. TINDEX > ISTEPI, ISTEPH is used.
TINDEX < ISTEPTI, ISTEPL is used.
Table 02h, Register C5h: ISTEPTI