TLK6002 datasheet(46/96 Pages) TI

46 / 96 page

TLK6002

SLLSE34 – MAY 2010

www.ti.com

Table 3-2. CHANNEL_CONTROL_1 (continued)

Address: 0x01

Default: 0x010D

BIT(s)

NAME

DESCRIPTION

ACCESS

1.5:4

RATE_RX [1:0]

Serdes RX rate settings

00 =

Full rate (Default 2’b00)

01 =

Half rate

10 =

Quarter rate

11 =

Eighth rate

Values written are valid only when RATE_A/B[2:0] pins are set to 3’b100 and ARS is not

enabled (10.13:12 = 2’b00)

In ARS mode, values written to these bits are not considered to determine serdes RX rate.

Instead it is automatically determined by ARS machine.

When read, these bits will reflect the final serdes Rx rate values

1.3:0

PLL_MULT[3:0]

Serdes PLL multiplier setting (Default 4’b1101). In ARS mode, values written to these bits is

not considered to determine serdes PLL multiplier. Instead it is automatically determined by

ARS machine and these bits when read will reflect that value.

Refer Table 3-3

See Appendix B for more information on PLL multiplier mettings

Table 3-3. PLL Multiplier Control

1[3:0]

VALUE

PLL MULTIPLIER FACTOR

VALUE

PLL MULTIPLIER FACTOR

0000

Reserved

1000

12x

0001

Reserved

1001

Reserved

0010

1010

15x

0011

1011

16x

0100

1100

16.5x

0101

1101

20x

0110

8.25x

1110

25x

0111

10x

1111

Reserved

Table 3-4. CHANNEL_CONTROL_2

Address: 0x02

Default: 0x000A

Bit(s)

Name

Description

Access

2.12:8

TWPOST1[4:0]

Adjacent post cursor Tap weight. Selects TAP settings for TX waveform. (Default 5’b00000)

Refer Table 3-5

2.7:4

TWPRE[3:0]

Pre cursor Tap weight. Selects TAP settings for TX waveform. (Default 4’b0000)

Refer Table 3-6

2.3:0

SWING[3:0]

Transmitter Output swing control for Serdes. (Default 4’b1010)

Refer Table 3-7

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