| 摘要 |
A semiconductor integrated circuit (210) for use in direct memory access (DMA) has 3 sources (214,215,216) which communicate with a bus (230) through a bus interface (220). A DMA access signal generator (290) is coupled to the bus interface (220) and asserts a DMA access output signal at DMA access signal pins (296,396) whenever either of the sources requires a DMA access. The need for separate DMA access signal pins for each of the 3 sources is thereby avoided. With targets on two separate integrated circuits (212,312), a single DMA access pin (396) can be used for the two targets (248,349), chip select signal at chip select pins (506,516) on the source integrated cicuit (210) indicate which of the two targets the DMA access is intended for. <IMAGE>
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