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MB90F347CE 数据表(PDF) 56 Page - fujitsu semiconductor |
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MB90F347CE 数据表(HTML) 56 Page - fujitsu semiconductor |
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56 / 85 page  MB90340E Series 56 4. AC Characteristics (1) Clock Timing (TA = −40 °C to +105 °C, VCC = 5.0 V ± 10%, fCP ≤ 24 MHz, VSS = AVSS = 0 V) * : When selecting the PLL clock, the range of clock frequency is limited. Use this product within the range as mentioned in “Relation between the external clock frequency and machine clock frequency”. Parameter Symbol Pin Value Unit Remarks Min Typ Max Clock frequency fC X0, X1 3 ⎯ 16 MHz When using an oscillation circuit X0, X1 3 ⎯ 24 MHz When using an external clock* fCL X0A, X1A — 32.768 100 kHz Clock cycle time tCYL X0, X1 62.5 ⎯ 333 ns When using an oscillation circuit X0, X1 41.67 ⎯ 333 ns When using an external clock tCYLL X0A, X1A 10 30.5 — µs Input clock pulse width PWH, PWL X0 10 ⎯⎯ ns Duty ratio is about 30 % to 70 %. PWHL, PWLL X0A 5 15.2 ⎯µs Input clock rise and fall time tCR, tCF X0 ⎯⎯ 5 ns When using external clock Internal operating clock frequency (machine clock) fCP ⎯ 1.5 ⎯ 24 MHz When using main clock fCPL ⎯⎯ 8.192 50 kHz When using sub clock Internal operating clock cycle time (machine clock) tCP ⎯ 41.67 ⎯ 666 ns When using main clock tCPL ⎯ 20 122.1 ⎯µs When using sub clock X0 tCYL tCF tCR 0.8 VCC 0.2 VCC PWH PWL X0A tCYLL tCF tCR 0.8 VCC 0.2 VCC PWHL PWLL Clock Timing |
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