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68HC705SP7 데이터시트(PDF) 122 Page - Freescale Semiconductor, Inc |
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68HC705SP7 데이터시트(HTML) 122 Page - Freescale Semiconductor, Inc |
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122 / 230 page ![]() Analog Subsystem General Release Specification MC68HC705JJ7/MC68HC705JP7 — Rev. 3.0 Analog Subsystem Table 8-5. Sample Conversion Timing (VDD = 5.0 Vdc) Bits Counts VX (Vdc) A/D Method Clock Source fOSC (MHz) tCHG (ms) CEXT ( µF) 4 16 3.5 Software Loop (12 bus cycles) (24 fOSC cycles) Mode 0 or 1 (manual) Low Power Oscillator 0.1 3.840 0.110 External Pin Oscillator 1.0 0.384 0.011 2.0 0.192 0.006 4.0 0.096 0.003 4 16 3.5 Programmable Timer (prescaler = 8) Mode 2 or 3 (TOF->ICF or OCF->ICF) Low Power Oscillator 0.1 1.280 0.037 External Pin Oscillator 1.0 0.128 0.004 2.0 0.064 0.002 4.0 0.032 0.001 6 64 3.5 Software Loop (12 bus cycles) (24 fOSC cycles) Mode 0 or 1 (manual) Low Power Oscillator 0.1 15.36 0.439 External Pin Oscillator 1.0 1.536 0.044 2.0 0.768 0.022 4.0 0.384 0.011 6 64 3.5 Programmable Timer (prescaler = 8) Mode 2 or 3 (TOF->ICF or OCF->ICF) Low Power Oscillator 0.1 5.120 0.585 External Pin Oscillator 1.0 0.512 0.059 2.0 0.256 0.029 4.0 0.128 0.015 8 256 3.5 Software Loop (12 bus cycles) (24 fOSC cycles) Mode 0 or 1 (manual) Low Power Oscillator 0.1 61.44 1.755 External Pin Oscillator 1.0 6.144 0.176 2.0 3.072 0.088 4.0 1.536 0.044 8 256 3.5 Programmable Timer (prescaler = 8) Mode 2 or 3 (TOF->ICF or OCF->ICF) Low Power Oscillator 0.1 20.48 0.585 External Pin Oscillator 1.0 2.048 0.059 2.0 1.024 0.029 4.0 0.512 0.015 10 1024 3.5 Programmable Timer (prescaler = 8) Mode 2 or 3 (TOF->ICF or OCF->ICF) Low Power Oscillator 0.1 (note 1) (note 1) External Pin Oscillator 1.0 8.192 0.234 2.0 4.096 0.117 4.0 2.048 0.059 12 4096 3.5 Programmable Timer (prescaler = 8) Mode 2 or 3 (TOF->ICF or OCF->ICF) Low Power Oscillator 0.1 (note 1) (note 1) External Pin Oscillator 1.0 32.768 0.936 2.0 16.384 0.468 4.0 8.192 0.234 1. Not usable as the value of CEXT would be greater than 2.0 µF Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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