DS1864 Maxim Integrated Products, DS1864 Datasheet - Page 28

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

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SFP Laser Controller and
Diagnostic IC
28
Lower Memory Register 06h to 07h: Low Temperature Warning Limit
FACTORY DEFAULT:
MEMORY TYPE:
Temperature measurements below this threshold will set its corresponding warning bit (Lower Memory Register 74h, bit 6).
Measurements above this threshold will automatically clear its warning bit.
Lower Memory Register 08h to 09h: High V
FACTORY DEFAULT:
MEMORY TYPE:
V ol tag e m easur em ents of the V
M easur em ents b el ow thi s thr eshol d w i l l automatically cl ear i ts al ar m b i t.
Lower Memory Register 0Ah to 0Bh: Low V
FACTORY DEFAULT:
MEMORY TYPE:
Voltage measurements of the V
Measurements above this threshold will automatically clear its alarm bit.
Lower Memory Register 0Ch to 0Dh: High V
FACTORY DEFAULT:
MEMORY TYPE:
V ol tag e m easur em ents of the V
5) . M easur em ents b el ow thi s thr eshol d w i l l automatically cl ear i ts w ar ni ng b i t.
____________________________________________________________________
0Ah
0Bh
0Ch
0Dh
06h
07h
08h
09h
bit7
bit7
bit7
bit7
2
2
2
2
2
2
2
S
15
15
15
-1
7
7
7
C C
CC
CC
i np ut ab ove thi s thr eshol d w i l l set i ts cor r esp ond i ng al ar m b i t ( Low er M em or y Reg i ster 70h, b i t 5) .
i np ut ab ove thi s thr eshol d w i l l set i ts cor r esp ond i ng w ar ni ng b i t ( Low er M em or y Reg i ster 74h, b i t
0000h
input below this threshold will set its corresponding alarm bit (Lower Memory Register 70h, bit 4).
0000h
2
0000h
0000h
2
Shadowed Memory (SEE)
Shadowed Memory (SEE)
Shadowed Memory (SEE)
2
Shadowed Memory (SEE)
2
2
2
2
2
14
14
-2
14
6
6
6
6
CC
CC
CC
Alarm Limit
Alarm Limit
Warning Limit
2
2
2
2
2
2
2
2
13
13
13
-3
5
5
5
5
2
2
2
2
2
2
2
2
12
12
-4
12
4
4
4
4
2
2
2
2
2
2
2
2
11
11
11
-5
3
3
3
3
2
2
2
2
2
2
2
2
10
10
-6
10
2
2
2
2
2
2
2
2
2
2
2
2
-7
1
9
1
9
1
9
1
bit0
bit0
bit0
bit0
2
2
2
2
2
2
2
2
-8
8
0
0
8
0
8
0