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AV9155-02W16L Datasheet(PDF) 3 Page - Integrated Circuit Systems |
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AV9155-02W16L Datasheet(HTML) 3 Page - Integrated Circuit Systems |
3 / 11 page 3 AV9155 Functionality - AV9155-01 (Using 14.318 MHz input.All frequencies in MHz.) CLOCK#2CPUand2XCPU *5V only. PERIPHERAL CLOCKS REFERENCE CLOCKS Functionality - AV9155-02 (Using 14.318 MHz input.All frequencies in MHz.) CLOCK#2CPUand2XCPU PERIPHERAL CLOCKS REFERENCE CLOCKS Frequency Transitions A key feature of the AV9155 is its ability to provide smooth, glitch-free frequency transitions on the CPU and 2XCPU clocks when the frequency select pins are changed. These frequency transitions do not violate the Intel 486 specification of less than 0.1% frequency change per clock period. Using an Input Clock as Reference The AV9155 is designed to accept a 14.318 MHz crystal as the input reference. With some external changes, it is possible to use a crystal oscillator or clock input. Please see application note AN04 for details on driving the AV9155 with a clock. COMMCLK (Pin 1) BUSCLK (Pin 6) FDCLK (Pin 7) KBCLK (Pin 8) 1.843* 16* 24* 12* COMMCLK (Pin 1) BUSCLK (Pin 6) FDCLK (Pin 7) KBCLK (Pin 8) 1.843* 32* 24* 12* REFCLK1 (Pin 13) REFCLK2 (Pin 14) 14.318 14.318 REFCLK1 (Pin 13) REFCLK2 (Pin 14) 14.318 14.318 FS2 (Pin 11) FS1 (Pin 19) FS0 (Pin 20) 2XCPU (Pin 17) CPU (Pin 18) 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 8 16 32 40 50 66.66 80* 100* 4 8 16 20 25 33.33 40* 50* FS2 (Pin 11) FS1 (Pin 19) FS0 (Pin 20) 2XCPU (Pin 17) CPU (Pin 18) 0 0 0 0 1 1 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 0 1 8 16 32 40 50 66.66 80* 100* 4 8 16 20 25 33.33 40* 50* *5V only. |
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