Reduced pin gigabit media independent interface

Details Reduced pin gigabit media independent interface Reduced pin gigabit media independent interface

2005-07-19

2005-07-19

Qureshi, Afsar (Department: 2667)

Multiplex communications

Pathfinding or routing

Through a circuit switch

C370S445000, C370S502000, C710S120000, C713S401000, C375S219000

Reexamination Certificate

active

06920132

ABSTRACT:
A network interface which reduces pin count in an MII or GMII system by logically combining certain signals to eliminate redundancies, thereby enabling one external connection or pin to perform the functions previously performed by multiple pins. In particular, the two connections previously used for TX_EN and TX_ER are reduced to a single TX_CTRL connection. Similarly, the three connections for RX_DV, CRS and RX_ER are reduced to a single RX_CTRL connection. The COL connection is also eliminated.

REFERENCES:
patent: 6108726 (2000-08-01), Runaldue et al.
patent: 6385208 (2002-05-01), Findlater et al.
RMII Specification, Rev. 1.2 plus Addendum Rev. A, 1997.
RMII Consortium, RMII™Specification, Rev. 1.2 (1997) pp. 1-14 and Addendum Rev. A .
35. Reconciliation Sublayer (RS) and Gigabit Media Independent Interface (GMII), (Local and Metropolican Area Networks), IEEE Std 802.3, 1998 Edition, pp 896-917.
22. Reconciliation Sublayer (RS) and Media Independent Interface (MII), (Local and Metropolican Area Networks), IEEE Std 802.3, 1998 Edition, pp 488-524.
Part 3: Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications, IEEE Std 802.3, 1998 Edition, Sections 14, 24, 25, 28, 35, 36 and Supplement.

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