topic Re: LPC55S28 Schematic review request in LPC Microcontrollers

LPC55S28 Schematic review request

steve5528 — Fri, 14 Mar 2025 10:38:46 GMT

Greetings!

I'm in the process of designing my first LPC55S28 board with fairly modest goals, as follows:

Power the MCU with MCU-link pro debug probe
Flash sample programs to MCU via debug probe
Test blinking led, and button operations
Test UART functionality thru VCOM facility of debug probe

Here is the schematic, and I would appreciate your review comments - it would be great to have the board working "right in the first pass" as NXP doc says.

I have two follow-up questions:

Is ISP support needed for the board if flashing is done mainly with MCU-link pro?
Is there a command line version of MCU-link pro to flash the device without having to invoke the IDE?

Thanks much in advance!

Re: LPC55S28 Schematic review request

EdwinHz — Fri, 14 Mar 2025 17:03:10 GMT

Hi @steve5528,

1. Technically you would not need ISP support, but it is highly recommended to include it for anything that might go wrong while programming the MCU.

2. You could use LinkFlash, which is a GUI based on LinkServer to flash NXP devices, which is based on command line. If you have the latest version of MCUXpresso installed (v24.12.148), you should also have LinkFlash v24.12.21 installed already.

BR,
Edwin.

Re: LPC55S28 Schematic review request

steve5528 — Fri, 14 Mar 2025 20:59:53 GMT

Hello @EdwinHz

Great. I will incorporate the ISP into schematics. Need to upgrade IDE so linkflash is installed.

Hopefully you or someone at NXP can comment on the schematics as well.

Re: LPC55S28 Schematic review request

EdwinHz — Tue, 18 Mar 2025 22:58:28 GMT

Hi @steve5528,

I apologize for missing the schematic review. It looks OK!

Re: LPC55S28 Schematic review request

steve5528 — Wed, 19 Mar 2025 16:28:07 GMT

Hi @EdwinHz Thank you.