參數(shù)資料
型號: DSP56366UM
廠商: 飛思卡爾半導體(中國)有限公司
元件分類: 數(shù)字信號處理
英文描述: 24-Bit Audio Digital Signal Processor
中文描述: 24位音頻數(shù)字信號處理器
文件頁數(shù): 102/110頁
文件大小: 1273K
代理商: DSP56366UM
DSP56366 Technical Data, Rev. 3.1
5-6
Freescale Semiconductor
sure that the part has completed its HI port programming (e.g., by setting the INIT bit in ICR then
polling it and waiting it to be cleared, then reading the ISR or by writing the TREQ/RREQ together
with the INIT and then polling INIT, ISR, and the HOREQ pin).
5.5.2
DSP Programming Considerations
Synchronization of Status Bits from Host to DSP
—DMA, HF1, HF0, HCP, HTDE, and HRDF
status bits are set or cleared by the host processor side of the interface. These bits are individually
synchronized to the DSP clock. (Refer to the
user’s manual for descriptions of these status bits.)
Reading HF0 and HF1 as an Encoded Pair
—Care must be exercised when reading status bits
HF0 and HF1 as an encoded pair, (i.e., the four combinations 00, 01, 10, and 11 each have
significance). A very small probability exists that the DSP will read the status bits synchronized
during transition. Therefore, HF0 and HF1 should be read twice and checked for consensus.
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