发明名称 |
Method and apparatus for providing fast interrupt response using a ghost instruction |
摘要 |
A data processing device 100 uses a portion of a random access memory 111 as an input buffer for holding a portion of a stream of data which is received by an input interface 130. Likewise, a portion of a memory 121 is used as an output buffer for holding a portion of processed data which is output by an output interface 140. A processing unit 110 within the processing device manages the flow of input and output data. The input interface asserts an I/O request 860 when it receives a data word, and the output interface asserts an I/O request 870 when it needs a data word. In response to an I/O request, fast interrupt circuitry inserts a ghost instruction which is formed by doppelganger circuitry into an instruction sequence which is being accessed from a ROM 112. The ghost instruction performs the requested data transfer.
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申请公布号 |
US5931934(A) |
申请公布日期 |
1999.08.03 |
申请号 |
US19970850431 |
申请日期 |
1997.05.02 |
申请人 |
TEXAS INSTRUMENTS INCORPORATED |
发明人 |
LI, STEPHEN (HSIAO YI);ROWLANDS, JONATHAN;NG, FUK HO PIUS |
分类号 |
G06F9/48;(IPC1-7):G06F9/46 |
主分类号 |
G06F9/48 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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