Sequential (147) Baud rate

https://johnchihau.blogspot.com/2026/05/httpskamchihau.html?m=1

Ref: https://johnchihau.blogspot.com/2026/07/john-take-look_0975489420.html?m=1

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John : See 1st picture.  In fact,  in our system,  we have plenty clock line of different baud rate. 

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Me: Those clock line of baud rate is from that we divide the frequency of the System Clock line by 4, by 8 or even by 16. 

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John : Yes, those clock lines of baud rate are mainly for internal for-loop. For example, 

For (int i = 0; i<20; i++) {}

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Me: However,  occasionally,  they are used in I/O operation, e.g., RS232 or UART.

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John: Occasionally,  ,. Now, we turn to see the 3rd picture.  It's a SPI model.

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Me: SPI model is very fast. Because,  it directly mobilize the System Clock line.  It hasn't used a multiplexer to divide the frequency of the System Clock line by 4, by 8 or by 16. 

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John: Yes, it's true.

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