tom dunigan

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7 years, 10 months ago.

is there a library to change CPU frequency of F469NI?

The LPC1768 has a library where one can alter the CPU frequency (used for coremark study), see https://developer.mbed.org/users/no2chem/notebook/mbed-clock-control--benchmarks/

Is there a way to alter the F469NI CPU frequency under program-control?

Using mbed-dev and hacking PLLN in stm32f4xx.c, here are some coremarkish numbers

MHz  /sec     ma
 24    55     87
 48   110     94
 72   166    101
 96   221    108
120   277    115
168   388    129
180   415    134

/media/uploads/manitou/corembed1.png /media/uploads/manitou/corembeda1.png

You can subtract about 40ma from LPC1768 current for Ethernet PHY

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Last updated: 20 Apr 2021
The STM32F469 Discovery kit (32F469IDISCOVERY) allows users to easily develop applications with the STM32F469 high-performance MCUs with ARM®Cortex®-M4 core and Chrom-ART Accelerator™.
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