Datasheet

DS1878
SFP+ Controller with Digital LDD Interface
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Table 02h, Register F3h: SETLOSL
FACTORY DEFAULT 00h
READ ACCESS PW2 or (PW1 and RWTBL246) or (PW1 and RTBL246)
WRITE ACCESS PW2 or (PW1 and RWTBL246)
MEMORY TYPE Nonvolatile (SEE)
F3h 2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
BIT 7 BIT 0
A 3-wire slave register. Only written if SETLOSCTL is 0. If SETLOSCTL is 1, then SETLOSH register is used. After
either V
CC
exceeds POA (after a POR event), the Maxim laser driver TX_POR bit is set high (visible in 3W
TXSTAT1, Bit 7), or on a rising edge of TXD, this value is written to a Maxim laser driver through the 3-wire
interface.
Table 02h, Register F4h: RXCTRL3
FACTORY DEFAULT 00h
READ ACCESS PW2 or (PW1 and RWTBL246) or (PW1 and RTBL246)
WRITE ACCESS PW2 or (PW1 and RWTBL246)
MEMORY TYPE Nonvolatile (SEE)
F4h 2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
BIT 7 BIT 0
A 3-wire slave register. The writing of this register is enabled using EXCTRL[1:0]. After either V
CC
exceeds POA
(after a POR event), the Maxim laser driver TX_POR bit is set high (visible in 3W TXSTAT1, Bit 7), or on a rising
edge of TXD, this value is written to a Maxim laser driver through the 3-wire interface.