Rainbow Electronics MAX3798 - Manual (Page 30)

MAX3798
1.0625Gbps to 10.32Gbps, Integrated, Low-
Power SFP+ Limiting Amplifier and VCSEL Driver
30 ______________________________________________________________________________________
REGISTER
FUNCTION/
ADDRESS
REGISTER
NAME
NORMAL
MODE
SETUP
MODE
BIT
NUMBER
/TYPE
BIT NAME
DEFAULT
VALUE
NOTES
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
R RW 3 TXDE_EN 0
Tx deemphasis
0: disable, 1: enable
R RW 2 SOFTRES 0 Global digital reset
R RW 1 TX_POL 1
Tx polarity
0: inverse, 1: normal
Transmitter
Control Register
Address = H0x05
TXCTRL
R RW 0 TX_EN 1
Tx control
0: disable, 1: enable
R R 7 (sticky) FST[7] X
TX_POR TX_VCC low-
limit violation
R R 6 (sticky) FST[6] X BMON open/shorted to V CC
R R 5 (sticky) FST[5] X
MMAX current exceeded or
open/shorted to GND
R R 4 (sticky) FST[4] X
BMAX current exceeded or
open/shorted to GND
R R 3 (sticky) FST3] X
V TOUT +/- common-mode
low-limit violation
R R 2 (sticky) FST[2] X V TOUT +/- low-limit violation
R R 1 (sticky) FST[1] X BIAS open or shorted to GND
Transmitter Status
Register 1
Address = H0x06
TXSTAT1
R R 0 (sticky) TX_FAULT X
Copy of FAULT signal in
case POR bits 6 to 1 reset
to 0
R R 3 (sticky) IMODERR X
Warning increment result >
IMODMAX
R R 2 (sticky) IBIASERR X
Warning increment result >
IBIASMAX
R R 1 (sticky) TXED X Tx edge detection
Transmitter Status
Register 2
Address = H0x07
TXSTAT2
R R 0 (sticky) Unused X Unused
Table 7. Register Summary (continued)