Rainbow Electronics DS1874 - Manual (Page 74)

DS1874
SFP+ Controller with Digital LDD Interface
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Table 02h, Register C6h: LUTTC
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)
C6h MODTC DAC1TC DAC2TC RESERVED RESERVED RESERVED RESERVED RESERVED
BIT 7 BIT 0
BIT 7
MODTC: Modulation TempCo
0 = Negative TempCo. For a TINDEX below the MODTI value, the 8-bit recalled value from the
MODULATION LUT is stored in the upper 8 bits of the MODULATION register. For a TINDEX greater
than or equal to MODTI, the recalled value is stored in the lower 8 bits of the MODULATION register.
1 = Positive TempCo. For a TINDEX (Table 02h, Register 81h) below the MODTI value (Table 02h,
Register C2h), the 8-bit recalled value from the MODULATION LUT is stored in the lower 8 bits of the
Modulation register. For a TINDEX greater than or equal to MODTI, the recalled value is stored in the
upper 8 bits of the Modulation register.
BIT 6
DAC1TC: DAC1 TempCo
0 = Negative TempCo. For a TINDEX below the DAC1TI value, the 8-bit recalled value from the DAC1
LUT is stored in the upper 8 bits of the DAC1 DAC’s register. For a TINDEX greater than or equal to
DAC1TI, the recalled value is stored in the lower 8 bits of the DAC1 DAC’s register.
1 = Positive TempCo. For a TINDEX (Table 02h, Register 81h) below the DAC1TI value (Table 02h,
Register C3h), the 8-bit recalled value from the DAC1 LUT is stored in the lower 8 bits of the DAC1
DAC’s register. For a TINDEX greater than or equal to DAC1TI, the recalled value is stored in the
upper 8 bits of the DAC1 DAC’s register.
BIT 5
DAC2TC: DAC2 TempCo
0 = Negative TempCo. For a TINDEX below the DAC2TI value, the 8-bit recalled value from the DAC2
LUT is stored in the upper 8 bits of the DAC2 DAC’s register. For a TINDEX greater than or equal to
DAC2TI, the recalled value is stored in the lower 8 bits of the DAC2 DAC’s register.
1 = Positive TempCo. For a TINDEX (Table 02h, Register 81h) below the DAC2TI value (Table 02h,
Register C4h), the 8-bit recalled value from the DAC2 LUT is stored in the lower 8 bits of the DAC2
DAC’s register. For a TINDEX greater than or equal to DAC2TI, the recalled value is stored in the
upper 8 bits of the DAC2 DAC’s register.
BITS 4:0 RESERVED