User guide

DS1875
PON Triplexer and SFP Controller
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Table 02h, Register D8h to F7h: EMPTY
Table 02h, Register F8h to F9h: MAN BIAS
FACTORY DEFAULT 00h
READ ACCESS PW2
WRITE ACCESS PW2 and BIAS EN = 1
MEMORY TYPE Volatile
FAh RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED MAN_CLK
BIT 7 BIT 0
When BIAS EN (Table 02h, Register 80h) is written to 0, bit 0 of this byte controls the updates of the MAN BIAS
value to the BIAS output. The values of MAN BIAS should be written with a separate write command. Setting bit 0
to a 1 clocks the MAN BIAS value to the output DAC.
1. Write the MAN BIAS value with a write command.
2. Set the MAN_CLK bit to a 1 with a separate write command.
3. Clear the MAN_CLK bit to a 0 with a separate write command.
Table 02h, Register FAh: MAN_CNTL
FACTORY DEFAULT 00h
READ ACCESS PW2
WRITE ACCESS PW2 and BIAS EN = 1
MEMORY TYPE Volatile
F8h RESERVED RESERVED 2
12
2
11
2
10
2
9
2
8
2
7
F9h 2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
BIT 7 BIT 0
When BIAS EN (Table 02h, Register 80h) is written to 0, writes to these bytes control the BIAS DAC.