DS1864 Maxim Integrated Products, DS1864 Datasheet - Page 32

• 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
32
Lower Memory Register 26h to 27h: Low MON3 Warning Limit
FACTORY DEFAULT:
MEMORY TYPE:
V ol tag e m easur em ents of the M ON 3 i np ut b el ow 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 75h, b i t 6) .
M easur em ents ab ove thi s thr eshol d w i l l automatically cl ear i ts w ar ni ng b i t.
Lower Memory Register 28h to 37h: Reserved Memory
Lower Memory Register 38h to 5Fh: External Calibration Constants
FACTORY DEFAULT:
MEMORY TYPE:
If external calibration constants are used for calibrating the transceiver module, they can be stored in this section of memory,
reserved for such use under SFF-8472.
Lower Memory Register 60h to 61h: Measured Temperature
FACTORY DEFAULT:
MEMORY TYPE:
Signed 2’s complement direct-to-digital temperature measurement.
Lower Memory Register 62h to 63h: Measured V
FACTORY DEFAULT:
MEMORY TYPE:
Unsigned voltage measurement of V
38h TO 5Fh
28h to 37h
____________________________________________________________________
26h
27h
60h
61h
62h
63h
bit7
bit7
bit7
2
2
2
2
2
S
15
15
-1
7
7
0000h
2
00h
N/A
N/A
2
Shadowed Memory (SEE)
Nonvolatile (EEPROM)
Volatile (SRAM)
2
Volatile (SRAM)
2
2
2
14
14
-2
6
6
6
CC
.
2
2
2
2
2
2
CC
13
13
-3
5
5
5
2
2
2
2
2
2
12
12
-4
4
4
4
RESERVED
EEPROM
2
2
2
2
2
2
11
11
3
-5
3
3
2
2
2
2
2
2
10
10
-6
2
2
2
2
2
2
2
2
2
-7
9
1
1
9
1
bit0
bit0
bit0
2
2
2
2
2
2
8
0
-8
0
8
0