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80296SA 数据表(PDF) 35 Page - Intel Corporation |
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80296SA 数据表(HTML) 35 Page - Intel Corporation |
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35 / 40 page ![]() PRELIMINARY 31 80296SA COMMERCIAL CHMOS 16-BIT MICROCONTROLLER 6.2.7 EXTERNAL CLOCK DRIVE Figure 13. External Clock Drive Waveforms Table 14. External Clock Drive Symbol Parameter Min Max Units F XTAL 1 External Input Frequency (1/TXLXL), PLL disabled 16 50† MHz External Input Frequency (1/TXLXL), PLL in 2x mode 8 25 MHz External Input Frequency (1/TXLXL), PLL in 4x mode 8 12.5 MHz T XTAL 1 Oscillator Period (T XLXL), PLL disabled 20 62.5 ns Oscillator Period (T XLXL), PLL in 2x mode 40 125 ns Oscillator Period (T XLXL), PLL in 4x mode 80 125 ns T XHXX High Time 0.35T XTAL 1 0.65T XTAL 1 ns T XLXX Low Time 0.35T XTAL 1 0.65T XTAL 1 ns T XLXH Rise Time 10 ns T XHXL Fall Time 10 ns † Assumes an external clock; the maximum input frequency for an external crystal oscillator is 25 MHz. TXLXX A2119-03 TXHXX TXHXL T XLXL 0.3 VCC – 0.5 V 0.7 VCC + 0.5 V TXLXH 0.7 VCC + 0.5 V 0.3 VCC – 0.5 V XTAL1 |
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