TNETE2008

OctalPHY

EIGHT 10BASE-T PHYSICAL-LAYER INTERFACES

SPWS042B – DECEMBER 1997 – REVISED JUNE 1998

17

POST OFFICE BOX 655303

non-data MAC-to-PHY and PHY-to-MAC control exchanges

Autonegotiation parameters can be sent to the TNETE2008 by the MAC and the results of the link negotiation

reported to the MAC using the multiplexed data pins during non-network data time (IFLINK = 0). This signaling

system also allows the MAC to force the configuration of the TNETE2008 duplex and pause modes to those

it requested.

When IFLINK and IFTXEN are deasserted, duplex, pause, speed, and force configuration information is

transferred from MAC to TNETE2008 on terminals IFTXD0, IFTXD1, IFTXD2, and IFTXD3, respectively.

When IFLINK and IFRXDV are deasserted, duplex, pause, and speed information is transferred from

TNETE2008 to MAC on terminals IFRXD0, IFRXD1, and IFRXD2, respectively.

Figure 8 shows the control information exchange for the case where the MAC is not forcing the configuration

of the link. In this case, the link configuration is determined by autonegotiation. The TNETE2008 latches the

final requested values just before FLP exchange commences. The diagrams show only one channel; for clarity,

time slices from other PHYs are not shown interspersed with the sample channel.