MCX Microcontrollersのトピックrt500's high-speed boot model

rt500's high-speed boot model

wx1 — Fri, 16 Jan 2026 08:56:49 GMT

Hi NXP community, I'm working with the MIMXRT595. I saw in the Reference Manual that it mentions a high-speed boot mode. How should I configure or start it? During testing, I found that the maximum speed for SPI Serial Boot cannot exceed 24MHz.

Re: rt500's high-speed boot model

mayliu1 — Tue, 20 Jan 2026 02:42:08 GMT

Hi @wx1 ,

Thank you so much for your interest in our products and for using our community.

Regarding your question, to enable high-speed boot mode, we need to burn fuse BOOT_CLK_SPEED. But the latest RM has little description about it and does not contain the fuse item. I have created an internal ticket for it, If there is any feedback, I will inform you promptly.

Take care if the high-speed boot mode is enabled, the power-on voltage need to meet the required.

Best Regards

MayLiu

Re: rt500's high-speed boot model

mayliu1 — Mon, 26 Jan 2026 02:47:52 GMT

Hi @wx1 ,

Thank you for your patience.

Please note that the OTP Fusemap XLS will be included in the next Reference Manual release, which is currently planned for next month.

Thank you for your understanding and cooperation.

Best Regards

MayLiu