Rainbow-electronics MAX3799 Bedienungsanleitung PDF herunterladen (Seite 30)

MAX3799

1Gbps to 14Gbps, SFP+ Multirate Limiting

Amplifier and VCSEL Driver

30 ______________________________________________________________________________________

FUNCTION/

ADDRESS

NAME

NORMAL

MODE

SETUP

MODE

BIT

NUMBER

/TYPE

BIT NAME

DEFAULT

VALUE

NOTES

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) X X

R R 4 (sticky) X X

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 (sticky) 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

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

Table 7. Register Summary (continued)

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

Amplifier and VCSEL Driver 1

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