TLK105 datasheet(52/99 Pages) TI

52 / 99 page

TLK105

TLK106

SLLSEB8A – AUGUST 2012 – REVISED MARCH 2013

www.ti.com

8.1.10 Control register 1 (CR1)

Table 8-13. Control register 1 (CR1), address 0x0009

BIT

BIT NAME

DEFAULT

DESCRIPTION

15:10

RESERVED

1, RW

RESERVED

RMII

0, RW

RMII Enhanced Mode:

Enhanced

1 = Enable RMII Enhanced Mode

Mode

0 = RMII operates in normal mode

In normal mode, If the line is not idle CRS_DV goes high. As soon as the False Carrier is

detected, RX_ER is asserted and RXD is set to “2”. This situation remains for the duration

of the receive event. While in enhanced mode, CRS_DV is disqualified and de-asserted

when the False Carrier detected. This status also remains for the duration of the receive

event. In addition in normal mode, the start of the packet is intact. Each symbol error is

indicated by setting RX_ER high. The data on RXD is replaced with “1” starting with the

first symbol error. While in enhanced mode, the CRS_DV is de-asserted with the first

symbol error.

TDR

0, RW

TDR Auto Run at link down:

AUTORUN

1 = Enable execution of TDR procedure after link down event

0 = Disable automatic execution of TDR

Link Loss

0, RW

Link Loss Recovery:

Recovery

1 = Enable Link Loss Recovery mechanism. This mode allow recovery from short

interference and continue to hold the link up for period of additional few mSec till

the short interference will gone and the signal is OK.

0 = Normal Link Loss operation. Link status will go down approximately 250uSec from

signal loss.

Fast Auto

0, RW

Fast Auto MDI/MDIX:

MDI-X

1 = Enable Fast Auto MDI/MDIX mode

0 = Normal Auto MDI/MDIX mode.

If both link partners are configured to work in Force 100Base-TX mode (Auto-Negotiation

is disabled), this mode enables Automatic MDI/MDIX resolution in a short time.

Robust Auto

0, RW

Robust Auto MDI-X :

MDI-X

1 = Enable Robust Auto MDI/MDIX resolution

0 = Normal Auto MDI/MDIX mode

If link partners are configured to operational modes that are not supported by normal Auto

MDI/MDIX mode (like Auto-Neg versus Force 100Base-TX or Force 100Base-TX versus

Force 100Base-TX), this Robust Auto MDI/MDIX mode allows MDI/MDIX resolution and

prevents deadlock.

Fast AN En

0, RW

Fast AN En:

1 = Enable Fast Auto-Negotiation mode – The PHY auto-negotiates using Timer

setting according to Fast AN Sel bits (bits 3:2 this register)

0 = Disable Fast Auto-Negotiation mode – The PHY auto-negotiates using normal

Timer setting

Adjusting these bits reduces the time it takes to Auto-negotiate between two PHYs. Note:

When using this option care must be taken to maintain proper operation of the system.

While shortening these timer intervals may not cause problems in normal operation, there

are certain situations where this may lead to problems.

Submit Documentation Feedback

Product Folder Links: TLK105 TLK106

TLK105 Datasheet(PDF) 52 Page - Texas Instruments

TLK105 Datasheet(HTML) 52 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99

Datasheet Download

Link URL