Rainbow-electronics MAX3798 Bedienungsanleitung PDF herunterladen (Seite 30)

MAX3798

1.0625Gbps to 10.32Gbps, Integrated, Low-

Power SFP+ Limiting Amplifier and VCSEL Driver

30 ______________________________________________________________________________________

FUNCTION/

ADDRESS

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

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

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

TOUT+/-

common-mode

low-limit violation

R R 2 (sticky) FST[2] X V

TOUT+/-

low-limit violation

R R 1 (st icky) FST[1] X BIAS open or shorted to GND

Transmitter Status

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

Address = H0x07

TXSTAT2

R R 0 (sticky) Unused X Unused

Table 7. Register Summary (continued)

1 2 ... 25 26 27 28 29 30 31 32 33 34 35

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