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Re: FCY頻率算法
#2
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Tcy 為 System Instruction Cycle 為 Fosc/4 後的速度,所以以80MHz 的速度奇 Fcy 為 20MHz。

發表於: 2006/4/7 18:23
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FCY頻率算法
#1
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我的外部震盪是10MHZ
PLL設為8倍
那頻率是變為10M*8/4=20MHZ嗎?

還有 如果將T1CON=0X8030來起動預除器1:256,
週期暫存器為PR1=(FCY/256)/2, 那FCY與是用外部的震盪來除嗎?

有點看不懂頻率算法的關係~~謝謝~~

發表於: 2006/4/7 16:03
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