Ds1876 sfp controller with dual ldd interface – Rainbow Electronics DS1876 User Manual
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DS1876
SFP Controller with Dual LDD Interface
Table 02h, Register C7h: TBLSELPON
Table 02h, Register C8h–C9h: MOD2 DAC
FACTORY DEFAULT
00h
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 location
MEMORY TYPE
Nonvolatile (SEE)
C7h
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
BIT 7
BIT 0
Chooses the initial value for the TBL SEL byte (Lower Memory, Register 7Fh) at power-on.
FACTORY DEFAULT
0000h
READ ACCESS
PW2 or (PW1 and RWTBL2) or (PW1 and RTBL2)
WRITE ACCESS
(PW2 and MOD2EN = 0) or (PW1 and RWTBL2 and MOD2EN = 0)
A2h AND B2h MEMORY
Common A2h and B2h memory location
MEMORY TYPE
Volatile
C8h
0
0
0
0
0
0
2
9
2
8
C9h
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
BIT 7
BIT 0
The digital value used for MOD2 DAC. It is the result of LUT4 plus MOD2 OFFSET times 4 recalled from Table
04h (Registers F8h–FFh) at the adjusted memory address found in TINDEX. This register is updated at the end of
the temperature conversion.
MOD2 DAC = LUT4 + MOD2 OFFSET x 4
REFIN
MOD2
V
V
MOD2 DAC
1024
=
Ч