TLK110 Datasheet, PDF(74/104 Page) Texas Instruments – Industrial Temp, Single Port 10/100Mbs Ethernet Physical Layer

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TLK110 Datasheet, PDF (74/104 Pages) Texas Instruments – Industrial Temp, Single Port 10/100Mbs Ethernet Physical Layer

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TLK110

SLLS901A â DECEMBER 2011 â REVISED FEBRUARY 2012

8.5 Cable Diagnostic Configuration/Result Registers

8.5.1 ALCD Registers Control and Results 1

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Table 8-35. ALCD Control and Results 1 Register, address 0x0155

BIT

BIT NAME

15 alcd_start

14:13

12 alcd_done

11:4 alcd_out1

3 RESERVED

2:0 alcd_ctrl

DEFAULT

<0>, SC

<00>, RO

<0>, RO

<0000

0000>, RO

<0>, RO

<000>,RW

DESCRIPTION

alcd_start:

RESERVED: Writes ignored, read as 0.

TPTD Diagnostic Bypass

1 = Bypass TPTD diagnostic. TDR on TPTD pair will not be executed.

0 = TDR is executed on TPTD pair

alcd_out1

RESERVED: Writes ignored, read as 0.

alcd_ctrl

<000>:

<001>:

<010>:

<011>:

<100>:

<101>:

<110>:

<111>:

8.5.2 Cable Diagnostic Specific Control Register (CDSCR)

This register is used to select the channel for which cable diagnostics test needs to be done. It has the

enable/bypass bits for the diagnostic tests and also allows defining the number of executed and averaged

TDR sequences.

Table 8-36. Cable Diagnostic Specific Control Register (CDSCR), address 0x0170

BIT

BIT NAME

15 RESERVED

14 Diagnostic Cross

Disable

13 Diagnostic TPTD

Bypass

12 Diagnostic TPRD

Bypass

11 RESERVED

10:8 Diagnostics Average

Cycles

7:0 RESERVED

DEFAULT

0,RO

0,RW

0,RO

1,RW

<110>,RW

0,RO

DESCRIPTION

RESERVED: Writes ignored, read as 0.

Cross TDR Diagnostic mode

1 = Disable TDR Cross mode â TDR will be executed in regular mode only

0 = Diagnostic of crossing pairs is enabled In Cross Diagnostic mode, the TDR mechanism

is looking for reflection on the other pair to check short between pairs.

TPTD Diagnostic Bypass

1 = Bypass TPTD diagnostic. TDR on TPTD pair will not be executed.

0 = TDR is executed on TPTD pair

In bypass TPTD, results are available in TPRD slots.

TPRD Diagnostic Bypass

1 = Bypass TPRD diagnostic. TDR on TPRD pair will not be executed.

0 = TDR is executed on TPRD pair

RESERVED: Must be Set to 1.

Number Of TDR Cycles to Average:

<000>: 1 TDR cycle

<001>: 2 TDR cycles

<010>: 4 TDR cycles

<011>: 8 TDR cycles

<100>: 16 TDR cycles

<101>: 32 TDR cycles

<110>: 64 TDR cycles (default)

<111>: Reserved

RESERVED: Writes ignored, read as 0.

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