Patent ID: 7493511

Claim:
A transmit-side client interface for a media access controller, comprising: a media access controller core including a transmit engine; a transmit-side datapath coupled to the media access controller core, the transmit-side datapath including a first set of registers and a second set of registers, the first set of registers clocked responsive to a first clock signal, the second set of registers clocked responsive to a second clock signal, the second clock signal being a divided version of the first clock signal; a multiplexer controller coupled to a portion of the first set of registers and coupled to a portion of the second set of registers, the multiplexer controller clocked responsive to the first clock signal, the multiplexer controller coupled to receive a transmit acknowledgement signal and registered versions of a most significant word valid signal and a data valid signal, the multiplexer controller configured to provide select signaling; and wherein the media access controller is embedded in an integrated circuit having programmable logic capable of operating at the second clock signal frequency.