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Which clock is used for DSPI's protocol clock in MPC5744?

Question asked by Yoshitaka Abe on May 30, 2019
Latest reply on May 30, 2019 by Petr Stancik

Dear all,

Now, I want to know that which clock is used for DSPI's protocol clock in MPC5744.

Could anyone teach me it?

 

In the Figure 2-8 at Page 116(Page 117 in the PDF file)  in MPC5744P Reference Manual(REV6.1)(https://www.nxp.com/docs/en/reference-manual/MPC5744PRM.pdf), the PBRIDGEx_CLK are supplied to DSPI(4).

And the word "Protocol Clock" is nothing in the DSPI(4) box.

The maximum frequency of PBRIDGE_0, PBRIDGE_1 is defined to 50MHz in the Table 13-2 in Page 339(Page 701 in the PDF file ). 

 

But the fp(the protocol clock) is described with 100MHz or 20MHz as the example in the Table 49-5 at Page 1609(Page 1971 in the PDF file).

 

Is the other clock used for the protocol clock of DSPI?

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