LPC804 MCU SYS clock for PWM

[Arularasan]

PWM works then I found my controller is using 12Mhz frequency .

how can i change my controller to 15mhz ?

I am using LPC804 microcontroller

[ZhangJennie]

Hi

If we want to set system clock as 15MHZ, set fro_osc as 30MHZ.

Select the fro_oscout (30 MHz/24 MHz/18 MHz) using the set_fro_frequency API call. see UM11065
Chapter 7 “LPC804 FRO API ROM routine” and Figure 9 “LPC804 FRO subsystem

See clock diagram as below:

Thanks,

Jun Zhang