TLK105_16 Datasheet, PDF (44/104 Pages) Texas Instruments – TLK105 TLK106 Industrial Temp, Single Port 10/100Mbs Ethernet Physical Layer

TLK105
TLK106
SLLSEB8C – AUGUST 2012 – REVISED APRIL 2016
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Table 8-4. Basic Mode Control Register (BMCR), address 0x0000 (continued)
BIT
BIT NAME
9 Restart Auto-
Negotiation
8 Duplex Mode
7 Collision Test
6:0 RESERVED
DEFAULT
0, RW/SC
1, Pin_Strap
led control
0, RW
0, RO
DESCRIPTION
Restart Auto-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:
When auto-negotiation is disabled writing to this bit allows the port Duplex capability to be
selected.
1 = Full Duplex operation
0 = Half Duplex operation
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.
RESERVED: Write ignored, read as 0.
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