Datasheet

DS1878
SFP+ Controller with Digital LDD Interface
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Table 02h, Register CFh: DEVICE VER
FACTORY DEFAULT DEVICE VERSION
READ ACCESS PW2 or (PW1 and RWTBL246) or (PW1 and RTBL246)
WRITE ACCESS N/A
MEMORY TYPE ROM
CFh DEVICE VERSION
BIT 7 BIT 0
Hardwired connections to show the device version.
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)
D0h–D7h 2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
BIT 7 BIT 0
High-Bias Alarm Threshold (HBATH) is a digital clamp used to ensure that the DAC setting for BIAS currents does
not exceed a set value. The table below shows the range of temperature for each byte’s location. The table shows a
rising temperature; for a falling temperature there is 1°C of hysteresis.
D0h Less than or equal to -8°C
D1h Greater than -8°C up to +8°C
D2h Greater than +8°C up to +24°C
D3h Greater than +24°C up to +40°C
D4h Greater than +40°C up to +56°C
D5h Greater than +56°C up to +72°C
D6h Greater than +72°C up to +88°C
D7h Greater than +88°C
Table 02h, Register D0h–D7h: HBATH