DSP performing instruction analyzed m-bit processing of data stored in memory with truncation / extension via data exchange unit
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United States of America Patent
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Nov 26, 2013
Grant Date -
Dec 8, 2011
app pub date -
Nov 9, 2010
filing date -
Jun 2, 2010
priority date (Note) -
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Abstract
A digital signal processor includes an instruction analysis unit, a digital signal processor (DSP) core and a memory unit. The instruction analysis unit receives an instruction and determines the required bit width M for the data process corresponding to the instruction. The DSP core performs the M-bit data process based on the bit width M determined by the instruction analysis unit, and the memory unit stores multiple data and performs the M-bit access based on the bit width M determined by the instruction analysis unit thereby allowing the DSP core to access, and at least one available space in the memory unit will be adjusted such that only the access space having the bit width M for the operation corresponding to the instruction will be open in each access, thereby effectively achieving the effect of power-saving.
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