| 摘要 |
A method and apparatus for enabling a processor (156) to access an external component (158a-n) through either a private bus (146) or a shared bus (148). One embodiment of the present invention is an external memory access apparatus which includes an external memory access unit (144). This external memory access unit (144) couples to the processor (156) through an external memory access unit bus (142). In addition, the external memory access unit (144) couples to external memory (158a-n) through a private bus (146). The external memory access unit (144) also couples to the external memory (158a-n) through a shared bus (148), which also couples an external component, one of (150), (152) or (154), to the external memory (158a-n).
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