Did you look into the SWD programming?
For what I found Nuvoton offers some tools on github (https://github.com/OpenNuvoton/Nuvoton_Tools) and mention openOCD, but the firmware for the interfaces seems to be closed source, and the NU-LINK2-PRO they point to is bloody expensive. Have not checked if there are cheaper options available.
Pre loaded boards make it usable with Arduino framework and maybe usable for partial bare metal, but for those who do like full bare metal it would be nice if reusing ST-Link devices was possible.
On the subject of programming, it looks like it does work with the ST-Link device, at least according to this post: https://www.eevblog.com/forum/microcontrollers/any-experience-with-nuvoton-mcus/msg4315357/#msg4315357
a tiny suggestion; also allow SMD mounting of the board by having one-and-a-half drilled hole
(castellated 'post stamp' + through hole pads) like ESPxxx modules often have (detail attached)
@tooki - no micro-USB will be in a design of mine , the Nano like board with LEE will have micro-USB like the original Nano, the "advanced" board, with SEE and 40 pins, will have USB C connector. The 3V3 variants that nobody cares, is not that they aren't significant or super widely used, nobody cares to make a new one because most of the sweet spots for that platform have been already reached.
a tiny suggestion; also allow SMD mounting of the board by having one-and-a-half drilled hole
(castellated 'post stamp' + through hole pads) like ESPxxx modules often have (detail attached)
Well, I was of the impression that most people doesn't lake castellation…
and mind changes, I guess we could do it if JLCPCB offers it, in the end we are still taking about Arduino clones, hot high-end boards ?
For the plus version it does not matter I think. Keep the port order along the pins or maybe create a proper bus arrangement based on the EBI.
It is the EBI bit that I find interesting as a way to allow reusing a lot of old 5V hardware I have lying around.
The Arduino nano compatible version does not lure me at all.
I opt for 2x26 pins to have full benefit of the MCU.
The fact that 6 pins can work on a different voltage is very nice. What setup do you have in mind to control this voltage?
About the ADC ref voltage I don't mind if it is only decoupled on the board and not available on the pins.
I will wait for the finished board and it's pricing before jumping on the bandwagon.
I'm just keeping an eye on developments at the moment. Will this project be open source, and will it use KiCad for the PCB design? Will the source code also be open source? Are we free to download the design files for local adaptation?
For a review by me or others on the forum, a pdf export of the schematic and pcb layers is probably the easiest.
As a hobbyist I use EasyEDA to draw schematics and pcb's. Have used JLCPCB for making the pcb's, and that was easy since they are affiliated, but have no experience with their full assembly options, so no help there.
P.S @pcprogrammer: Would you like to use EasyEDA to design this stuff as well ? Mostly asking for PCB.