DS1878T+T Maxim Integrated Products, DS1878T+T Datasheet - Page 63
DS1878T+T
Manufacturer Part Number
DS1878T+T
Description
Current Mode PWM Controllers SFP+ Controller w/ MAX3946&3945
Manufacturer
Maxim Integrated Products
Datasheet
1.DS1878TTR.pdf
(98 pages)
Specifications of DS1878T+T
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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Table 02h, Register 8Bh: CNFGC
8Bh
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
MEMORY TYPE
SFP+ Controller with Digital LDD Interface
XOVEREN
BITS 1:0
BIT 7
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
______________________________________________________________________________________
XOVEREN: Enables RSSI conversion to use the XOVER (Table 02h, Register 90h–91h) value during
MON3 conversions.
0 = Uses hysteresis for linear RSSI measurements.
1 = XOVER value is enabled for nonlinear RSSI measurements.
INVMON2:
0 = MON2 is referenced to GND.
1 = MON2 is referenced to V
TXDM34: Enables TXD to reset alarms and warnings associated to MON3 and MON4 during a TXD
event.
0 = TXD event has no effect on the MON3 and MON4 alarms, warnings, and quick trips.
1 = MON3 and MON4 alarms, warnings, and quick trips are reset during a TXD event.
TXDFG: See Figure 14.
0 = FETG, an internal signal, has no effect on TXDOUT.
1 = FETG is enabled and ORed with other possible signals to create TXDOUT.
TXDFLT: See Figure 14.
0 = TXF pin has no effect on TXDOUT.
1 = TXF pin is enabled and ORed with other possible signals to create TXDOUT.
TXDIO: See Figure 14.
0 = (Default) TXD input signal is enabled and ORed with other possible signals to create TXDOUT.
1 = TXD input signal has no effect on TXDOUT.
RSSI_FC and RSSI_FF: RSSI Force Coarse and RSSI Force Fine. Control bits for RSSI mode of
operation on the MON3 conversion.
00b = Normal RSSI mode of operation (default).
01b = The fine settings of scale and offset are used for MON3 conversions.
10b = The coarse settings of scale and offset are used for MON3 conversions.
11b = Normal RSSI mode of operation.
INVMON2
00h
PW2 or (PW1 and RWTBL246) or (PW1 and RTBL246)
PW2 or (PW1 and RWTBL246)
Nonvolatile (SEE)
TXDM34
CC
.
TXDFG
TXDFLT
TXDIO
RSSI_FC
RSSI_FF
BIT 0
63
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