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DS1886_V1 Datasheet - Page 84

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A2h Table 02h, Register F0h: 3WCTRL
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
MEMORY TYPE
F0h
RESERVED
RESERVED
BIT 7
BITS 7:3
RESERVED
BIT 2
3WMAN_3945: When this bit is set when 3WRW is set, only the MAX3945 is written using CSELOUT2.
3WRW: Initiates a 3-wire read or write operation. The write command uses the memory address found
in the 3-wire ADDRESS register (A2h Table 02h, Register F1h) and the data from the 3-wire WRITE
register (A2h Table 02h, Register F2h). The read command uses the memory address found in the
BIT 1
3-wire ADDRESS register (A2h Table 02h, Register F1h). The address determines whether a read or
write operation is to be performed. This bit clears itself at the completion of the operation.
0 = (Default) Reads back as 0 when the read or write operation is completed.
1 = Initiates a 3-wire read or write operation.
3WDIS: Disables all automatic communication across the 3-wire interface. This includes all updates
from the LUTs, the APC loop, and status registers updates. The only 3-wire communication is with the
BIT 0
manual mode of operation.
0 = (Default) Automatic communication is enabled.
1 = Disables automatic communication.
A2h Table 02h, Register F1h: ADDRESS
FACTORY DEFAULT
READ ACCESS
WRITE ACCESS
MEMORY TYPE
7
6
F1h
2
2
BIT 7
This byte is used during manual 3-wire communication. When a manual read or write is initiated, this register contains the
address for the operation.
SFP and PON ONU Controller
with Digital LDD Interface
00h
PW2 or (PW1 and RWTBL246) or (PW1 and RBL246)
PW2 or (PW1 and RWTBL246)
Volatile
RESERVED
RESERVED
RESERVED
00h
PW2 or (PW1 and RWTBL246) or (PW1 and RBL246)
PW2 or (PW1 and RWTBL246)
Nonvolatile (SEE)
5
4
3
2
2
2
DS1886
3WMAN_3945
3WRW
3WDIS
BIT 0
2
1
0
2
2
2
BIT 0
84

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