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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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DSP56600FM/AD 데이터시트(PDF) 47 Page - NXP Semiconductors |
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DSP56600FM/AD 데이터시트(HTML) 47 Page - NXP Semiconductors |
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47 / 76 page  DSP56652 Internal Clocks Preliminary MOTOROLA DSP56652 Technical Data Sheet 2-5 INTERNAL CLOCKS For each occurrence of TDH, TDL, TDC, or IDCYC, substitute with the numbers in Table 2-6 . DF, MF, and PDF are the DSP PLL division, multiplication, and pre- division factors set in registers. Table 2-5 DSP Clocks Characteristics Symbol Min Max Unit Input frequency to the DSP PLL EfD 0 16.8 MHz DSP PLL input clock cycle time ¥ with PLL disabled ¥ with PLL enabled ETDC 59.5 59.5 ¥ 273100 ns ns Table 2-6 Internal DSP Clocks Characteristics Symbol Expression Internal DSP operation frequency with PLL enabled fD (EfD ´ MF) / (PDF ´ DF) Internal DSP operation frequency with PLL disabled fD EfD/2 Internal DSP clock high period ¥ with PLL disabled ¥ with PLL enabled and MF £ 4 ¥ with PLL enabled and MF > 4 TDH ETDC (Min) 0.49 ´ ETDC ´ PDF ´ DF/MF (Max) 0.51 ´ ETDC ´ PDF ´ DF/MF (Min) 0.47 ´ ETDC ´ PDF ´ DF/MF (Max) 0.53 ´ ETDC ´ PDF ´ DF/MF Internal clock low period ¥ with PLL disabled ¥ with PLL enabled and MF £ 4 ¥ with PLL enabled and MF > 4 TDL ETDC (Min) 0.49 ´ ETDC ´ PDF ´ DF/MF (Max) 0.51 ´ ETDC ´ PDF ´ DF/MF (Min) 0.47 ´ ETDC ´ PDF ´ DF/MF (Max) 0.53 ´ ETDC ´ PDF ´ DF/MF Internal clock cycle time with PLL enabled TDC ETDC ´ PDF ´ DF/MF Internal clock cycle time with PLL disabled TDC 2 ´ ETDC DSP Instruction cycle time IDCYC TDC Table 2-7 MCU Clocks Characteristics Symbol Min Max Unit Frequency of the internal MCU-CLK clock fM 0 16.8 MHz Internal MCU-CLK clock cycle time TMC 59.5 ¥ ns Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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