"...the IoT stack has been developed for a Cortex M3 MCU..." ARM...

"...the IoT stack has been developed for a Cortex M3 MCU..."

ARM licenses this tech to chip manufacturers.  The following according to wikipedia, https://en.wikipedia.org/wiki/ARM_Cortex-M...

The following microcontrollers are based on the Cortex-M3 core:

• Actel SmartFusion, SmartFusion 2
• Analog Devices ADuCM3xx
• Atmel SAM3A, SAM3N, SAM3S, SAM3U, SAM3X
• Cypress PSoC 5LP, FM3
• Holtek HT32F
• Luminary Micro/TI LM3S1968
• NXP LPC1300, LPC1700, LPC1800
• ON Semiconductor Q32M210
• Silicon Labs Precision32
• Silicon Labs/Energy Micro EFM32 Tiny, Gecko, Leopard, Giant
• STMicroelectronics STM32 F1, F2, L1, W
• Texas Instruments SimpleLink Wireless MCUs (CC1310 Sub-GHz and CC2650 BLE+ZigBee+6LoWPAN)
• Toshiba TX03

The following chips have a Cortex-M3 as a secondary core:

• Apple A9 (Cortex-M3 as integrated M9 motion Co-Processor)
• CSR Quatro 5300 series (Cortex-M3 as co-processor)
• Samsung Exynos 7420 (Cortex-M3 as a DVS microcontroller)^[14]
• Texas Instruments F28, LM3, TMS470, OMAP 4470 (one Cortex-A9 + two Cortex-M3)
• XMOS XS1-XA family (seven xCORE + one Cortex-M3)

Does anyone have any other (better) info in this?

IMO, DYOR.