Rainbow Electronics MAX3799 - Manual (Page 29)

MAX3799
1Gbps to 14Gbps, SFP+ Multirate 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
Receiver Control
Register 1
Address = H0x00
RXCTRL1 R RW 1 RATE_SEL 0
Mode-select
0: high-gain mode, 1: high-
bandwidth mode
R RW 6 LOS_EN 1
LOS control
0: disable, 1: enable
(always 0 when RX_EN = 0)
R RW 5 LOS_POL 1
LOS polarity
0: inverse, 1: normal
R RW 4 RX_POL 1
Rx polarity
0: inverse, 1: normal
R RW 3 SQ_EN 0
Squelch
0: disable, 1: enable
R RW 2 RX_EN 1
Rx control
0: disable, 1: enable
R RW 1 RXDE_EN 0
Rx deemphasis
0: disable, 1: enable
Receiver Control
Register 2
Address = H0x01
RXCTRL2
R RW 0 AZ_EN 1
Rx autozero control
0: disable, 1: enable
(always 0 when RX_EN = 0)
Receiver Status
Register
Address = H0x02
RXSTAT R R 0 (sticky) LOS X Copy of LOS output signal
R RW 7 SET_CML[7] 0 MSB output level DAC
R RW 6 SET_CML[6] 1
R RW 5 SET_CML[5] 0
R RW 4 SET_CML[4] 1
R RW 3 SET_CML[3] 0
R RW 2 SET_CML[2] 0
R RW 1 SET_CML[1] 1
Output CML Level
Setting Register
Address = H0x03
SET_CML
R RW 0 SET_CML[0] 1 LSB output level DAC
R RW 5 SET_LOS[5] 0 MSB LOS threshold DAC
R RW 4 SET_LOS[4] 0
R RW 3 SET_LOS[3] 1
R RW 2 SET_LOS[2] 1
R RW 1 SET_LOS[1] 0
LOS Threshold
Level Setting
Register
Address = H0x04
SET_LOS
R RW 0 SET_LOS[0] 0 LSB LOS threshold DAC
Table 7. Register Summary