LPC54605 doesn't start SW execution after power recycling

[Elmar]

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.

[Elmar]

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?

[carstengroen]

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.....

[frank_m]

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.

[xiangjun_rong]

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

BR

XiangJun Rong

[Elmar]

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

[xiangjun_rong]

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-mc...

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

Hope it can help you

BR

Xiangjun Rong