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MB90480 Datasheet(PDF) 88 Page - Fujitsu Component Limited. |
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MB90480 Datasheet(HTML) 88 Page - Fujitsu Component Limited. |
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88 / 120 page 
MB90480/485 Series 88 4. AC Characteristics (1) Clock Timing (VSS = 0.0 V, TA = −40 °C to +85 °C) *1 : Be careful of the operating voltage. *2 : Duty ratio should be 50 % ± 3 %. Parameter Sym- bol Pin name Condi- tion Value Unit Remarks Min Typ Max Clock frequency FCH X0, X1 ⎯ 3 ⎯ 25 MHz External crystal oscillator ⎯ 3 ⎯ 50 External clock input ⎯ 4 ⎯ 25 1 multiplied PLL ⎯ 3 ⎯ 12.5 2 multiplied PLL ⎯ 3 ⎯ 6.66 3 multiplied PLL ⎯ 3 ⎯ 6.25 4 multiplied PLL ⎯ 3 ⎯ 4.16 6 multiplied PLL ⎯ 3 ⎯ 3.12 8 multiplied PLL FCL X0A, X1A ⎯⎯ 32.768 ⎯ kHz Clock cycle time tC X0, X1 ⎯ 20 ⎯ 333 ns *1 tCL X0A, X1A ⎯⎯ 30.5 ⎯µs Input clock pulse width PWH PWL X0 ⎯ 5 ⎯⎯ ns PWLH PWLL X0A ⎯⎯ 15.2 ⎯µs*2 Input clock rise, fall time tcr tcf X0 ⎯⎯ ⎯ 5 ns With external clock Internal operating clock frequency fCP ⎯⎯ 1.5 ⎯ 25 MHz *1 fCPL ⎯⎯ ⎯ 8.192 ⎯ kHz Internal operating clock cycle time tCP ⎯⎯ 40.0 ⎯ 666 ns *1 tCPL ⎯⎯ ⎯ 122.1 ⎯µs |
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