| 摘要 |
PROBLEM TO BE SOLVED: To provide an asynchronous transition signal control circuits, capable of applying to a bus arbitration apparatus, etc. SOLUTION: An OR gate 41-1 maintains a token (a feedback signal S) so long as a device grant signal 'Grant' has been outputting, even after a Muller C element with invertor 10-1 dropped an output of a response event AckOut as a result of being dropped of a request event ReqIn. If a device request signal Req is not output, the feedback signal S is passed through an AND gate 41-2 and a request event ReqOut is output from the AND gate 41-2. At the same time, the grant signal Grant is stopped to output and a loop composed of a Muller C element with invertor 10-2, the OR gate 41-1 and an AND gate 41-3 is cancelled. As a result of this cancellation, the token (the feedback signal S) is handed to a next transition signal control circuit, etc.
|
