DS1864 Maxim Integrated Products, DS1864 Datasheet - Page 55

• Manufacturer Part Number: DS1864
• Description: SFP Laser Controller and Diagnostic IC
• Manufacturer: Maxim Integrated Products

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Table 04h (Table 01h in DS1859 Configuration), C0h: Reserved Memory
Table 04h (Table 01h in DS1859 Configuration), B8h to BFh: Thresholds For High-Bias Warning Flags (HBWA)
FACTORY DEFAULT:
MEMORY TYPE:
These represent the high thresholds for comparing bias levels. Each warning byte contains the value for the threshold
corresponding to the temperature range indicated below. Only the upper 8 bits of the 16 bit measurement are compared here.
BCh
BDh
BAh
BBh
B8h
B9h
BEh
BFh
C 0h
BAh
BBh
BCh
BDh
B8h
B9h
BEh
BFh
bit7
2
2
2
2
2
2
2
2
7
7
7
7
7
7
7
7
Warning byte location when temperature is less than -8°C.
Warning byte location when temperature in the range of -8°C to +8°C.
Warning byte location when temperature in the range of +8°C to +24°C.
Warning byte location when temperature in the range of +24°C to +40°C.
Warning byte location when temperature in the range of +40°C to +56°C.
Warning byte location when temperature in the range of +56°C to +72°C.
Warning byte location when temperature in the range of +72°C to +88°C.
Warning byte location when temperature is greater than +88°C.
FFh
Shadowed Memory (SEE)
2
2
2
2
2
2
2
2
6
6
6
6
6
6
6
6
____________________________________________________________________
2
2
2
2
2
2
2
2
5
5
5
5
5
5
5
5
SFP Laser Controller and
2
2
2
2
2
2
2
2
4
4
4
4
4
4
4
4
RESERVED
2
2
2
2
2
2
2
2
3
3
3
3
3
3
3
3
2
2
2
2
2
2
2
2
Diagnostic IC
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
1
1
1
1
1
1
1
1
bit0
2
2
2
2
2
2
2
2
0
0
0
0
0
0
0
0
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