MAX3799 Maxim Integrated Products, MAX3799 Datasheet - Page 31

• Manufacturer Part Number: MAX3799
• Description: SFP+ Multirate Limiting Amplifier And VCSEL Driver
• Manufacturer: Maxim Integrated Products

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Table 7. Register Summary (continued)
Modulation
Current Setting
Register
Address = H0x09
Maximum
Modulation
Current Setting
Register
Address = H0x0A
Maximum Bias
Current Setting
Register
Address = H0x0B
Modulation
Current Increment
Setting Register
Address = H0x0C
FUNCTION/
REGISTER
ADDRESS
1Gbps to 14Gbps, SFP+ Multirate Limiting
______________________________________________________________________________________
REGISTER
SET_IMOD
IMODMAX
IBIASMAX
MODINC
NAME
NORMAL
Accessible through
MODE
REG_ADDR = 12
RW
RW
RW
RW
RW
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
SETUP
MODE
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
R
R
R
Amplifier and VCSEL Driver
NUMBER
/TYPE
BIT
8
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
SET_IMOD[8]
SET_IMOD[7]
SET_IMOD[6]
SET_IMOD[5]
SET_IMOD[4]
SET_IMOD[3]
SET_IMOD[2]
SET_IMOD[1]
SET_IMOD[0]
SET_IMOD[0]
IMODMAX[7]
IMODMAX[6]
IMODMAX[5]
IMODMAX[4]
IMODMAX[3]
IMODMAX[2]
IMODMAX[1]
IMODMAX[0]
IBIASMAX[7]
IBIASMAX[6]
IBIASMAX[5]
IBIASMAX[4]
IBIASMAX[3]
IBIASMAX[2]
IBIASMAX[1]
IBIASMAX[0]
MODINC[4]
MODINC[3]
MODINC[2]
MODINC[1]
MODINC[0]
BIT NAME
DE_INC
X
DEFAULT
VALUE
0
0
0
1
0
0
1
0
0
0
0
1
1
0
0
0
0
0
0
0
1
0
0
1
0
0
0
0
0
0
0
0
0
MSB modulation DAC
LSB modulation DAC
MSB modulation limit
LSB modulation limit
MSB bias limit
LSB bias limit
LSB of SET_IMOD DAC
register address = H0x09
Deemphasis increment
0: no update, 1: SET_TXDE
updates ±1 LSB
MSB MOD DAC two’s
complement
LSB MOD DAC two’s
complement
NOTES
31