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AS0142AT 데이터시트(PDF) 39 Page - ON Semiconductor |
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AS0142AT 데이터시트(HTML) 39 Page - ON Semiconductor |
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39 / 45 page ![]() AS0142AT www.onsemi.com 39 INPUT CLOCKS Table 28. INPUT CLOCKS Clock Min (MHz) Typical (MHz) Max (MHz) Description EXTCLK 10 (without XTAL) 20 (with XTAL) 27 29 Primary system clock. Drives PLLs. Crystal frequency range is 20-29 MHz, otherwise 10-29 MHz. OUTPUT CLOCKS Table 29. Output Clocks Clock MIN (MHz) Typical (MHz) Max (MHz) Description PIXCLK 18 74.25/25 80/125 Clock of parallel output bus. If pad voltage is 1.8 V nominal, then max frequency is 80 MHz. If pad voltage is 2.5 V, the hold time will decrease to 1.9 ns from 2.0 ns @ 125 MHz If pad voltage is 3.3V, then the max frequency is 125Mhz. SPI_SCLK 1.2 20 SPI clock to nonvolatile external memory. |
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