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发表于 2009-7-17 00:18:16
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For generating a waveform output in CTC mode, the OC1A output can be set to toggle
its logical level on each compare match by setting the compare output mode bits to toggle
mode (COM1A1:0 = 1). The OC1A value will not be visible on the port pin unless the
data direction for the pin is set to output (DDR_OC1A = 1). The waveform generated will
have a maximum frequency of fOC1A = fclk_I/O/2 when OCR1A is set to zero (0x0000). The
waveform frequency is defined by the following equation:
fOCnA = (fclk_I/O) / 2N(1 + OCRnA)
= --------------------------------------------------
The N variable represents the prescaler factor (1, 8, 64, 256, or 1024)
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看了好几十遍了,比我都多了。上面的看到以及看懂么?
如果类似看武侠小说那样,就是看过几百遍也是白看的。 |
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