MC9S12XEP100datasheep IPLL setting questions

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MC9S12XEP100datasheep IPLL setting questions

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兜里揣caca
Contributor II

HI:

   t.pngPLL.png

in MC9S12XEP100datasheep I found a question , the "table A-25 IPLL Characteristics" At the bottom  fosc = 4MHz configured as fBUS = 50MHz, REFDIV = 01,REFFRQ = 01; but I found at the table "11-2.reference clock frequency selection" if REFDIV = 01 , and the  fREF = 4/(1+1)=2M; Shouldn't REFFRQ be equal to 0 ?

Thank you.

Have a great day

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2 Replies

122 Views
lama
NXP TechSupport
NXP TechSupport

hi,

the easiest answer I can provide you is the answer I sent a few days ago and you will not be able to think about calculation complexity.

Please go to our pages and you can find there calculator at the page:

S12XE MCUs|16-Bit Microcontroller|NXP 

 

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Or directly:

https://www.nxp.com/downloads/en/calculators/S12XESW.zip 

 

Examples:

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Best regards,

Ladislav

122 Views
兜里揣caca
Contributor II

Thank you very much for helping me with this problem !

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