Datasheet

50 Maxim Integrated
SFP Controller for Dual Rx Interface
DS1877
Table 02h, Register 92h–93h: V
CC
SCALE
Table 02h, Register 94h–95h: XOVER2 COARSE
Table 02h, Register 96h–97h: XOVER2 FINE
Table 02h, Register 98h–99h: RSSI2 COARSE SCALE
Table 02h, Register 9Ah–9Bh: RSSI2 FINE SCALE
Table 02h, Register 9Ch–9Dh: RSSI1 COARSE SCALE
Table 02h, Register 9Eh–9Fh: RSSI1 FINE SCALE
Table 02h, Register A0h–A1h: INTERNAL TEMP OFFSET
FACTORY CALIBRATED
READ ACCESS PW2 or (PW1 and RWTBL2) or (PW1 and RTBL2)
WRITE ACCESS PW2 or (PW1 and RWTBL2)
A2h AND B2h MEMORY Common A2h and B2h memory locations
MEMORY TYPE Nonvolatile (SEE)
92h, 94h,
96h, 98h,
9Ah, 9Ch,
9Eh
2
15
2
14
2
13
2
12
2
11
2
10
2
9
2
8
93h, 95h,
97h, 99h,
9Bh, 9Dh,
9Fh
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
BIT 7 BIT 0
Controls the scaling or gain of the full-scale voltage measurements. The factory-calibrated value produces an
FS voltage of 6.5536V for V
CC
, 2.5V for RSSI2 COARSE and RSSI1 COARSE, and 0.3125V for RSSI2 FINE and
RSSI1 FINE.
FACTORY CALIBRATED
READ ACCESS PW2 or (PW1 and RWTBL2) or (PW1 and RTBL2)
WRITE ACCESS PW2 or (PW1 and RWTBL2)
A2h AND B2h MEMORY Common A2h and B2h memory locations
MEMORY TYPE Nonvolatile (SEE)
A0h S 2
8
2
7
2
6
2
5
2
4
2
3
2
2
A1h 2
1
2
0
2
-1
2
-2
2
-3
2
-4
2
-5
2
-6
BIT 7 BIT 0
Allows for offset control of temperature measurement if desired. The final result must be XORed with BB40h
before writing to this register. Factory calibration contains the desired value for a reading in degrees Celsius.