Rainbow Electronics MAX3798 - Manual (Page 31)

MAX3798
1.0625Gbps to 10.32Gbps, Integrated, Low-
Power SFP+ Limiting Amplifier and VCSEL Driver
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REGISTER
FUNCTION/
ADDRESS
REGISTER
NAME
NORMAL
MODE
SETUP
MODE
BIT
NUMBER
/TYPE
BIT NAME
DEFAULT
VALUE
NOTES
R RW 8 SET_IBIAS[8] 0 MSB bias DAC
R RW 7 SET_IBIAS[7] 0
R RW 6 SET_IBIAS[6] 0
R RW 5 SET_IBIAS[5] 0
R RW 4 SET_IBIAS[4] 0
R RW 3 SET_IBIAS[3] 1
R RW 2 SET_IBIAS[2] 0
R RW 1 SET_IBIAS[1] 0
Bias Current
Setting Register
Address = H0x08
SET_IBIAS
Accessible through
REG_ADDR = 13
0 SET_IBIAS[0] 0 LSB bias DAC
R RW 8 SET_IMOD[8] 0 MSB modulation DAC
R RW 7 SET_IMOD[7] 0
R RW 6 SET_IMOD[6] 0
R RW 5 SET_IMOD[5] 1
R RW 4 SET_IMOD[4] 0
R RW 3 SET_IMOD[3] 0
R RW 2 SET_IMOD[2] 1
R RW 1 SET_IMOD[1] 0
Modulation
Current Setting
Register
Address = H0x09
SET_IMOD
Accessible through
REG_ADDR = 12
0 SET_IMOD[0] 0 LSB modulation DAC
R RW 7 IMODMAX[7] 0 MSB modulation limit
R RW 6 IMODMAX[6] 0
R RW 5 IMODMAX[5] 1
R RW 4 IMODMAX[4] 1
R RW 3 IMODMAX[3] 0
R RW 2 IMODMAX[2] 0
R RW 1 IMODMAX[1] 0
Maximum
Modulation
Current Setting
Register
Address = H0x0A
IMODMAX
R RW 0 IMODMAX[0] 0 LSB modulation limit
R RW 7 IBIASMAX[7] 0 MSB bias limit
R RW 6 IBIASMAX[6] 0
R RW 5 IBIASMAX[5] 0
R RW 4 IBIASMAX[4] 1
R RW 3 IBIASMAX[3] 0
R RW 2 IBIASMAX[2] 0
R RW 1 IBIASMAX[1] 1
Maximum Bias
Current Setting
Register
Address = H0x0B
IBIASMAX
R RW 0 IBIASMAX[0] 0 LSB bias limit
Table 7. Register Summary (continued)