LPC MicrocontrollersのトピックRe: LPC54605 doesn't start SW execution after power recycling

LPC54605 doesn't start SW execution after power recycling

Elmar — Mon, 24 Jul 2023 07:58:29 GMT

Hi,

I switched to LPC54605J512 MCU because of its performance.

However, the program doesn't start automatically after power recycling. I need to reprogram the MCU to make the SW start execution.

The RST pin is linked to VCC and I use Keil as a development environment.

Below you will find the programming jlink configuration screenshots.

Thanks for your feedback and help.

BR.

Re: LPC54605 doesn't start SW execution after power recycling

xiangjun_rong — Mon, 24 Jul 2023 10:34:36 GMT

Hi,

If you want to LPC54605 to run from internal flash after power on, you have to set the three pins PIO0_4, PIO0_5 and PIO0_6 pins high logic by connecting a pull-up resistor on the three PIO0_4, PIO0_5 and PIO0_6 pins so that the chip will fetch/execute code from internal flash after power-on.

Hope it is helpful

XiangJun Rong

Re: LPC54605 doesn't start SW execution after power recycling

Elmar — Mon, 24 Jul 2023 11:47:44 GMT

Thanks, XiangJun for your reply

What a stupid design by NXP!, usually default value makes MCU boot from internal memory.

As I already designed and manufactured my PCBA, how can I make it to boot from internal flash? Can I set internal pullup resistors from Config Tool?

Re: LPC54605 doesn't start SW execution after power recycling

frank_m — Mon, 24 Jul 2023 12:20:36 GMT

By reading the user manual beforehand, and testing the code sufficiently.
The "stupidity" is here not on NXP's side.

I never came across a commercial design in my career were the final version was identical to the first prototype.

Re: LPC54605 doesn't start SW execution after power recycling

carstengroen — Mon, 24 Jul 2023 13:53:44 GMT

The only thing "stupid" here is not reading the datasheet and users manual when designing stuff.

Did you also not read that it needs 3.3V, did you apply 12V ? I guess not.
Time to do a respin...

Its written pretty clearly.....

Re: LPC54605 doesn't start SW execution after power recycling

Elmar — Tue, 25 Jul 2023 14:17:27 GMT

Dear XiangJun

Is there another "surprise" point such as ISP configuration that I need to know before redesigning my circuit using LPC54605?

And another question about the programming, when I used LPC845, Normal reset was enough to make the chip run the main program after flashing, but I need absolutely select Core Reset for LPC54605. Any feedback?

Also, when I use Segger RTT viewer connected, I can't flash the chip, however, it was possible when I used LPC845.

Thanks again for your valuable feedback.

Elmar

Re: LPC54605 doesn't start SW execution after power recycling

xiangjun_rong — Wed, 26 Jul 2023 02:26:16 GMT

Hi,

Pls refer to section 13.3 Connecting power, clocks, and debug functions in data sheet of LPC546xx, which can be downloaded from the website:

https://www.nxp.com/products/processors-and-microcontrollers/arm-microcontrollers/general-purpose-mcus/lpc54000-arm-cortex-m4-/power-efficient-microcontrollers-mcus-with-advanced-peripherals-based-on-arm-cortex-m4-core:LPC546XX

BTW, pls refer to the section 6.2.1 Termination of unused pins in the data sheet.

Hope it can help you

Xiangjun Rong