The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 25, 2001
Filed:
Jul. 28, 1999
Koji Oyama, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A symmetric asynchronous interface circuit for interfacing between two asynchronously operating devices has a first and third synchronization circuits for synchronizing a READY signal outputted by a transmitting device to a clock signal on the side of a receiving device and outputting the synchronized READY signal to the receiving device, first and second delay circuits for delaying a signal corresponding to the synchronized READY signal outputted by the first/third synchronization circuit and outputting the delayed signal as an ACKNOWLEDGE signal, second and fourth synchronization circuits for synchronizing the ACKNOWLEDGE signal outputted by the first/second delay circuit to a clock signal on the side of the transmitting device, and first and second pulse generation circuits for generating a pulse signal when the synchronized ACKNOWLEDGE signal is supplied from the second/fourth synchronization circuit and outputting the pulse signal to the transmitting device as an ACKNOWLEDGE signal.