| 摘要 |
<p>PURPOSE:To control a range of kind of information whose priority right is transferred by setting a closed priority right transfer path to resource request senders whose priority right transfer is allowed. CONSTITUTION:An n:1 selector using a previous command signal PREV as a control input is provided to the circuit, an input among priority transfer inputs OCB1-OCBn pointed out by the PREV is an output of the SELECTOR and OR between an output of the SELECTOR and a priority command input PRIORITY1 is an output of an OR gate U2A. Then an output of the OR sate U2A and a resource request input REQ1 are ANDed by an AND gate U3A and its output is used as it is for a selection output SEL1. Moreover, the inverse of the resource request input REQ1 is an output of an inverter U1A, and an output of the inverter U1A and an output of an OR gate U2A are ANDed by an AND gate U3B and its output is used as it is for a transfer output OCB1. Thus, the range of information kind in which the priority right is transferred is able to be controlled.</p> |
