very low power 16-Bit MCU?

[moez0102]

Posted on May 24, 2018 at 10:07

Could you propose to me a very low power 16-bit MCU, please?

[Nesrine M_O]

Posted on May 24, 2018 at 10:22

Hi

aziz.moez

,

http://www.st.com/en/microcontrollers.html

contains a comprehensive range of microcontrollers, from low-cost 8-bit MCUs up to 32-bit Arm

®

-based Cortex®-M0 and M0+, Cortex®-M3,Cortex®-M4 and Cortex®-M7 Flash microcontrollers.

If you are looking for

low power MCU, I recommend the

http://www.st.com/content/st_com/en/products/microcontrollers/stm32-32-bit-arm-cortex-mcus/stm32-ultra-low-power-mcus.html?querycriteria=productId=SC2157

.

-Nesrine-

[Szymon PANECKI]

Posted on May 24, 2018 at 10:23

Hello,

ST doesn't have 16-bit devices in MCUs portfolio. You can consider using either 8-bit MCUs (

http://www.st.com/en/microcontrollers/stm8-8-bit-mcus.html?querycriteria=productId=SC1244

family) or 32-bit MCUs (

http://www.st.com/en/microcontrollers/stm32-32-bit-arm-cortex-mcus.html

family).

Both STM8 and STM32 families have low-power series:

- from STM8 there are STM8L and STM8AL series

- from STM32 there are STM32L0, STM32L1, STM32L4 and STM32L4+ series

Regards

Szymon

[AvaTar]

Posted on May 24, 2018 at 10:39

TI has low-power variants of their MSP430 controllers.

Could you propose to me a very low power 16-bit MCU, please?

Limiting yourself to a certain architectural characteristic is contra-productive. There are no specific advantages of 16 bit MCUs over 32 bit MCUs - rather the other way around.

[henry.dick]

Posted on May 24, 2018 at 11:25

'

There are no specific advantages of 16 bit MCUs over 32 bit MCU'

Code density? Simplicity? Existing code base? Tookchain? ...

The cortex m is basically a 16bit like MCU. And the L variant has fairly good performance.

[AvaTar]

Posted on May 24, 2018 at 11:36

You should have included the rest in the quote - rather the other way around.

Structural quirks and size limitations actually make 8 and 16 bit MCUs less code size efficient. With 16 bit, you can only address 64kByte. If you exceed this limit, you need an additional offset. The MSP430 loses >20% performance with 'long addresses'.

Pretty sure this is all about price. And a 8 bit or 16 bit MCU is not automatically cheaper than a 32 bit MCU.