Ds1874 sfp+ controller with digital ldd interface – Rainbow Electronics DS1874 User Manual
Page 77
DS1874
SFP+ Controller with Digital LDD Interface
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77
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