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DSP56721 데이터시트(PDF) 18 Page - Freescale Semiconductor, Inc |
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DSP56721 데이터시트(HTML) 18 Page - Freescale Semiconductor, Inc |
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18 / 54 page ![]() SymphonyTM DSP56720 / DSP56721 Multi-Core Audio Processors, Rev.1 Freescale Semiconductor 18 2.2.1 Serial Host Interface (SHI) SPI Protocol Timing See Table 11 for SHI SPI protocol timing parameters and Figure 15, Figure 16, Figure 17, and Figure 18 for timing diagrams. Table 11. Serial Host Interface SPI Protocol Timing Parameters No. Characteristics1,3,4 Mode Filter Mode Expression Min Max Unit 23 Minimum serial clock cycle = tSPICC(min) Master/Slave Bypassed 10 x TC + 9 59.0 – ns Very Narrow 10 x TC + 9 59.0 – ns Narrow 10 x TC + 133 183.0 – ns Wide 10 x TC + 333 373.0 – ns XX Tolerable Spike width on data or clock in – Bypassed – – 0 ns Very Narrow – – 10 ns Narrow – – 50 ns Wide – – 100 ns 24 Serial clock high period Master Bypassed 0.5 x (tSPICC -10) 33.0 – ns Very Narrow 0.5 x (tSPICC -10) 33.0 – ns Narrow 0.5 x (tSPICC -10) 86.0 – ns Wide 0.5 x (tSPICC -10) 121.5 – ns Slave Bypassed 2.5 x TC + 12 22.5 – ns Very Narrow 2.5 x TC + 12 22.5 – ns Narrow 2.5 x TC + 102 114.5 – ns Wide 2.5 x TC + 189 201.5 – ns 25 Serial clock low period Master Bypassed 0.5 x (tSPICC -10) 33.0 – ns Very Narrow 0.5 x (tSPICC -10) 33.0 – ns Narrow 0.5 x (tSPICC -10) 86.0 – ns Wide 0.5 x (tSPICC -10) 121.5 – ns Slave Bypassed 2.5 x TC + 12 22.5 – ns Very Narrow 2.5 x TC + 12 22.5 – ns Narrow 2.5 x TC + 102 114.5 – ns Wide 2.5 x TC + 189 201.5 – ns 26 Serial clock rise/fall time Master Slave – – – – – – – 5 ns ns |
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