TLK111 datasheet(51/110 Pages) TI1

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TLK111

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SLLSEF8B – AUGUST 2013 – REVISED JANUARY 2014

Table 8-4. Basic Mode Control Register (BMCR), address 0x0000 (continued)

BIT

BIT NAME

DEFAULT

DESCRIPTION

IEEE Power

0, RW

Power Down:

Down

1 = Enables IEEE power down mode

0 = Normal operation

Setting this bit powers down the PHY. Only minimal register functionality is enabled during

the power down condition. To control the power down mechanism, this bit is ORed with the

input from the INT/PWDN pin. When the active low INT/PWDN is asserted, this bit is set.

Isolate

0, RW

Isolate:

1 = Isolates the Port from the MII with the exception of the serial management

0 = Normal operation

Restart Auto-

0, RW/SC

Restart Auto-Negotiation:

Negotiation

1 = Restart Auto-Negotiation. Re-initiates the Auto-Negotiation process. If Auto-

Negotiation is disabled (bit 12 = 0), this bit is ignored. This bit is self-clearing and will

return a value of 1 until Auto-Negotiation is initiated, whereupon it will self-clear.

Operation of the Auto-Negotiation process is not affected by the management entity

clearing this bit.

0 = Normal operation

Re-initiates the Auto-Negotiation process. If Auto-Negotiation is disabled (bit 12 = 0), this bit

is ignored. This bit is self-clearing and will return a value of 1 until Auto-Negotiation is

initiated, whereupon it self-clears. Operation of the Auto-Negotiation process is not affected

by the management entity clearing this bit.

Duplex Mode

1, Pin_Strap,

Duplex Mode:

SWSC_Strap,

When auto-negotiation is disabled writing to this bit allows the port Duplex capability to be

selected.

1 = Full Duplex operation

led control

0 = Half Duplex operation

Collision Test

0, RW

Collision Test:

1 = Collision test enabled

0 = Normal operation

When set, this bit causes the COL signal to be asserted in response to the assertion of

TX_EN within 512 bit times. The COL signal is de-asserted within 4 bit times in response to

the de-assertion of TX_EN.

6:0

RESERVED

0, RO

RESERVED: Write ignored, read as 0.

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