| 摘要 |
PROBLEM TO BE SOLVED: To reduce a circuit scale of a bus interface wrapper circuit by allowing an AHB-Lite master to be built in an AHB bus system in the same manner as an AHB master without providing local arbiters per AHB slave. SOLUTION: A wrapper circuit 1-1 is added to an AHB-Lite master 4-5. The wrapper circuit 1-1 sends a signal showing a state of being not capable of receiving data, to the AHB-Lite master when receiving a data transfer request from the AHB-Lite master and temporarily holds transfer data, and during this period, the wrapper circuit issues an access request signal to an arbiter 2-4 and transfers data to an AHB slave 4-4 through a selector 4-3 in response to reception of an access permission signal. The wrapper circuit ceases to issue the access request signal to the arbiter and transmits a data transfer completion signal to the AHB-Lite master, in response to reception of a data transfer completion signal from the AHB slave. COPYRIGHT: (C)2007,JPO&INPIT
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