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If CPHA= 0 and CPOL=1, then which of the following is true?

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+1 vote
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in Microcontroller by (14.6k points)
If CPHA= 0 and CPOL=1, then which of the following is true?

(a) read on rising edge, changed on a falling edge

(b) read on falling edge, changed on a rising edge

(c) write on rising edge, changed on a falling edge

(d) write on rising edge, changed on a falling edge

I got this question in homework.

The origin of the question is SPI Protocol in chapter AVR Microcontroller of Microcontroller

1 Answer

0 votes
by (24.2k points)
The correct answer is (b) read on falling edge, changed on a rising edge

The best I can explain: If CPOL= 1 and CPHA= 0, then reading operation is performed on the rising edge and the change occurs at every falling edge.

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