Structure and method for an asynchronous communication protocol

Details Structure and method for an asynchronous communication protocol Structure and method for an asynchronous communication protocol

1992-01-24

1994-05-03

Ray, Gopal C.

Boots, shoes, and leggings

395200, 364230, 3642304, 364260, 3642408, 3642409, 364DIG1, G06F 1516, G06F 1300

Patent

active

053095677

ABSTRACT:
In accordance with the present invention, a structure and a method for asynchronously interfacing a master processor and a slave processor is provided by receiving from and providing to the master device control signals of a polling protocol, and receiving from and providing to the slave device control signals of an interrupt type protocol. In a first embodiment of this invention, the master processor provides WR (write request), RD (read request), OE (output enable) signals, and receives a BUSY (busy) signal. The slave processor receives an "int" (interrupt) signal, and provides "intack" (interrupt acknowledge), "outs" (output), and "ins" (input) signals. In a second embodiment of this invention, instead of the RD signal of the first embodiment, the read request signal is the AND product of an AS (address strobe) signal and the most significant bit of the read address.

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