Apparatus and method in a network interface device for storing r

Details Apparatus and method in a network interface device for storing r Apparatus and method in a network interface device for storing r

1998-09-03

2000-11-28

Lee, Thomas C.

Electrical computers and digital data processing systems: input/

Input/output data processing

Input/output data buffering

710 53, 710 54, 710 55, 710 56, 710 57, 710129, 711156, 711129, 711153, 370428, 370452, G06F 1314, G06F 1300, G06F 1200, H04L 1228, H04L 1256

Patent

active

061547964

ABSTRACT:
A network interface device includes a random access memory used as a transmit and receive buffer for transmission and reception of data frames between a host computer bus and a packet switched network. The network interface device includes read and write controllers for each of the transmit and receive buffers, where each write controller operates in a clock domain separate from the corresponding read controller. The read and write controllers output status information corresponding to the reading or writing of a stored data frame in the receive buffer. The memory management unit includes a synchronization circuit, which arbitrates updates to the holding registers by the read and write controllers based on the asynchronously determined presence of at least one stored data frame.

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