LPC MicrocontrollersのトピックRe: LPC55s69 IAP Flash init generates hardfault @150MHz system clk

LPC55s69 IAP Flash init generates hardfault @150MHz system clk

cgarcia — Tue, 25 May 2021 17:17:05 GMT

Using SDK Version: 2.9.1 for LPC55S69 and Running lpcxpresso55s69_flashiap1 example, I tried to set system clk to the maximum: 150MHz.

However it generates hard fault once FLASH_Init function is reached (hard fault type showed in image attached).

In base of lpcxpresso55s69_flashiap1 example in SDK Version: 2.9.1

Is there some restriction using iap flash at 150MHz?

Additional setting is required to make it work?

Thanks

Re: LPC55s69 IAP Flash init generates hardfault @150MHz system clk

Alice_Yang — Wed, 26 May 2021 05:21:41 GMT

Hello cgarcia,

Could you share your project, I will help to check it, thanks.

Alice

Re: LPC55s69 IAP Flash init generates hardfault @150MHz system clk

cgarcia — Wed, 26 May 2021 14:51:01 GMT

Thanks Alice,

I attached flash example project which I am taking as base, coming from SDK Version: 2.9.1 for LPC55S69.

There I am trying to set system clk to 150MHz but it triggers a hardfault. I tried with 100MHz and it works. I would like to know if there are some flash limitation or additional setting required in the case of 150MHz.

Thanks

Re: LPC55s69 IAP Flash init generates hardfault @150MHz system clk

Alice_Yang — Thu, 27 May 2021 08:23:03 GMT

Hello cgarcia,

From UM we can see

"Flash operations (erase, blank check, program) and reading a single word can only be
performed for CPU frequencies of up to 100 MHz. These operations cannot be performed
for frequencies above 100 MHz. "

Alice

Re: LPC55s69 IAP Flash init generates hardfault @150MHz system clk

cgarcia — Fri, 28 May 2021 04:08:36 GMT

Got it, thanks Alice.