TLK6002 datasheet(53/96 Pages) TI

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TLK6002

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SLLSE34 – MAY 2010

Table 3-13. SERDES_CONTROL_1

Address: 0x08

Default: 0x3D4C

BIT(s)

NAME

DESCRIPTION

ACCESS

8.14:12 EQPRE[2:0]

Serdes Rx precursor equalizer selection

000 = 1/9 cursor amplitude

001 = 3/9 cursor amplitude

010 = 5/9 cursor amplitude

011 = 7/9 cursor amplitude (Default 3’b011)

100 = 9/9 cursor amplitude

101 = 11/9 cursor amplitude

110 = 13/9 cursor amplitude

111 = Disable

8.11:10 CDRTHR[1:0]

Clock data recovery algorithm threshold selection

00 = Four vote threshold

01 = Eight vote threshold

10 = Sixteen vote threshold

11 = Thirty two vote threshold (Default 2’b11)

8.9:8

CDRFMULT[1:0]

Clock data recovery algorithm frequency multiplication selection

00 = First order. Frequency offset tracking disabled

01 = Second order. 1x mode (Default 2’b01)

10 = Second order. 2x mode

11 = Reserved

8.7:6

AGCCTRL[1:0]

Adaptive gain control loop

00 = Attenuator will not change after lock has been achieved, even if AGC becomes

unlocked

01 = Attenuator will not change when in lock state, but could change when AGC becomes

unlocked (Default 2’b01)

10 = Force the attenuator off.

11 = Force the attenuator on

8.5:4

AZCAL[1:0]

Auto zero calibration.

00 = Auto zero calibration initiated when receiver is enabled (Default 2’b00)

01 = Auto zero calibration disabled

10 = Forced with automatic update.

11 = Forced without automatic update

8.3

TX_PMA_BIT_ORDER

Determines whether LSB or MSB of the parallel inputs to be sent out first on serial

transmit pins.

0 = TDx[19] or TDx[9] (MSB) is serially transmitted first

1 = TDx[10] or TDx[0] (LSB) is serially transmitted first (Default 1’b1)

8.2

RX_PMA_BIT_ORDER Determines whether serially received first bit to be sent out on LSB or MSB of the parallel

outputs.

0 = RDx[19] or RDx[9] (MSB) is serially received first

1 = RDx[10] or RDx[0] (LSB) is serially received first (Default 1’b1)

8.1

TX_INVPAIR

Transmitter polarity.

0 = Normal polarity. TXxP considered positive data and TXxN considered negative data

(Default 1’b0)

1 = Inverted polarity. TXxP considered negative data and TXxN considered positive data

8.0

RX_INVPAIR

Receiver polarity.

0 = Normal polarity. RXxP considered positive data. RXxN considered negative data

(Default 1’b0)

1 = Inverted polarity. RXxP considered negative data. RXxN considered positive data

Table 3-14. SCRAMBLER_CONTROL

Address: 0x09

Default: 0x0000

BIT(s)

NAME

DESCRIPTION

ACCESS

9.15

TX_SCRAMBLER_EN

0 = Disables scrambler on the transmit datapath (Default 1’b0)

1 = Enables scrambler on the transmit datapath

9.14:8 TX _SCRAMBLER_SEED[6:0]

7 bit scrambler seed used when TX scrambler is enabled.

(Default 7’b0000000)

9.7

RX_DESCRAMBLER_EN

0 = Disables De-scrambler on the receive datapath (Default 1’b0)

1 = Enables De-scrambler on the receive datapath

9.6:0

RX_DESCRAMBLER_SEED[6:0]

7 bit De-scrambler seed used when RX De-scrambler is enabled.

(Default 7’b0000000)

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