Electronics > Microcontrollers

So there is a Cortex-M OTP MCU...

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technix:
MindMotion MM32P020 series. 4KB OTP ROM, 128 bytes SRAM, Cortex-M0 core, 5V operation.

128 bytes SRAM...

JPortici:
Wow, zero hits on google.

By the way, what advantages do we have with OTP memory over flash memory?
If i had to make a guess i would say increased reliability, with also lower cost..
does OTP memory not suffer from data retention loss, as flash memory does?

Kjelt:
Depends how they implemented the OTP memory.
If it is the same process but updated as proms (you know eproms without uv transparant glass window) that in fact have small capacitors that hold the charge but will leak over time, you will still have data retention loss. It all depends how good they have made the isolation layers and how big the capacitors in that case.
If they implemented it as fuses you won't have this problem.
The third option is the most feasible IMO that it is just flash memory but without the possibility to erase it (eg disabled or missing boostconverter for the higher erase voltage) so the retention times will be the same as the other modern flash products which is pretty good.

westfw:
An arm with 128bytes of ram sounds awful.

SiliconWizard:

--- Quote from: westfw on October 20, 2018, 08:33:21 am ---An arm with 128bytes of ram sounds awful.

--- End quote ---

Pretty much. And just 4KB of ROM space? :D But I'm sure there are still a few applications.

Would technix happen to have any link or documentation? Zero hit on all search engines I tried.
I guess this is yet another very low-cost chinese MCU? I'm amazed at how creative and productive they can be when it comes to developing such low-cost, to-the-point products. Even though *we* often don't see the point, I'm sure *they* perfectly do.

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