Hello,
Is there a nano version of the Uno R4 minima planned ?
I mean a nano with the same renesas microcontroller.
Thank you inadvance for your reply,
best regards,
I think the nano is just a form factor now, not a "mini" Uno anymore.
There is plenty of "powerful" nanos now, such as Nano ESP32.
There is a microcontroller in a pretty small formfactor that outperfoms them all
This is the Teensy 4.1. Which has already an SD-Card-slot on board
PJRC provides very good arduino support and has ported many libraries for use with the Teensy 4.1
best regards Stefan
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I have no insight into what might be planned. However, I think it an interesting idea.
Probably not an identical chip to the Uno, since the 64 pin chip is physically difficult in a small package. You could make the module wider, or use a 48/40 pin variant.
I might design one just for fun. I created a module based on an XMC1400 (Cortex M0) to fit on a 40 way module which is somewhat pin compatible with a 40 pin AVR, but I didn't use Arduino ecosystem to program it.
Are there any particular requirements you have for a hypothetical "nano R4", or is just to have something software compatible in a smaller form factor?
I think nano R4 would be an interesting device as well.
I have an Uno R4 and plan to develop some simple system with it. If I get it to work, the next step is to integrate it to a smaller PCB. That design would benefit from using a smaller variant of the Renesas MCU. I studied and compared pin-outs between 64 and 48 pin versions and nothing really important seems to be missing from the 48-pin one.
I wonder if there's anything in the Arduino code that would cause incompatibility to that variant? All memory sizes and registers are unchanged.
I've just seen a post in the [ITALIANO] Lo spamm bar (Part 3) topic from gpb01, https://forum.arduino.cc/t/italiano-lo-spamm-bar-part-3/1333957/997 that says that a Nano R4 using a Renesas processor is now available.
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... YES ... also in the official Arduino Store 
Guglielmo
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I found the following third party small form factor RA4M1 boards:
Seeed Studio Xiao (pincount reduced)
RA4M1 Zero Mini (pincount reduced)
WeAct RA4M1 (double rows of pins)
Haven't checked Arduino IDE support though. Hopefully there supporting board packages from vendors.
The Teensy looks like a nice board (purchased one myself for a particular purpose but not used it yet) with plenty of pins and features including Ethernet and PSRAM.
The ONLY ONE with both crystals ... 16 MHz for MOSC and 32.768 KHz for SOSC
Guglielmo