DP83848C Datasheet, PDF (42/82 Pages) National Semiconductor (TI) – PHYTER - Commercial Temperature Single Port 10/100 Mb/s Ethernet Physical Layer Transceiver

Table 11. Basic Mode Control Register (BMCR), address 0x00 (Continued)
Bit
Bit Name
Default
Description
7
Collision Test
0, RW
Collision Test:
1 = Collision test enabled.
0 = Normal operation.
When set, this bit will cause the COL signal to be asserted in response
to the assertion of TX_EN within 512-bit times. The COL signal will be
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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