STM32WB15 and STM32WB10 retain the Arm Cortex-M4 application processor and paired Cortex-M0+ Bluetooth 5.2 stack processor, but come with:
- 320kbyte flash for stack and application – with sector protection against R/W operations,
- 48kbyte SRAM – 36kbyte has hardware parity check
- 20 x 32bit back-up register
- Boot loader supporting USART, SPI, I2C interfaces
- 1kbyte (128 double words) OTP
“The devices can run a full certified Bluetooth Low Energy certified stack thanks to their SDK, or proprietary protocols thanks to its host controller interface or Bluetooth low-level driver interface,” according to the company. “The only difference between the STM32WB15 and STM32WB10 is that the former has extended cryptographic performances and an integrated SMPS for further power consumption applications – hence, applications that require Bluetooth LE and a fairly generous MCU but that won’t need over-the-air updates, or a lot of memory, can benefit from a new price point that makes the STM32WB more accessible.”
