lpc541xx PLL Calculator

[hk123]

Hello All,

I am wondering if there is a reference utility pll calculator I can use.

Basically I have a board which has 25Mhz external crystal and I want to have the system clock to be 96 Mhz.

Can some one guide me as to PLL register settings I can use.

Best Regards.

[Sabina_Bruce · Accepted solution]

Hello ,

Hope you are doing well.

I'd recommend to use the clock config tool. Here you have a user friendly diagram which will help you configure the PLL accordingly. It also provides warnings when exceeding the limits of multiplier and divider. I attempted to get a 96 MHz system clock from 25 MHz input and got close but not exactly.

nxf51209_0-1599888291894.png

For more details on how to use the clock config tool, please review the Config Tool user guide.

Best Regards,

Sabina

[hk123]

This is perfect. Thanks Sabina.

[Sabina_Bruce]

Glad to help!