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STM32 MCU family goes 64-bit with the STM32MP2x (Cortex-A35)

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Re: STM32 MCU family goes 64-bit with the STM32MP2x (Cortex-A35)

#11

Still calling your new 64-bit chips STM32, just like your 32-bit chips, instead of STM64, feels like your branding/marketing team is asleep at the wheel or just non-existent. Even Nintendo figured that out ~30 years ago.

Or they can spend less in SEO using a similar name and from the same family?

Re: STM32 MCU family goes 64-bit with the STM32MP2x (Cortex-A35)

#12

Does anyone know why some of the balls in the (render pics) are missing around the edges? Unrelated: Would this be suitable for a CV system eg in robotics? Eg do the realtime stuff on the Cortex-M, and run a linux + OpenCV/OpenVINO etc on the Cortex-A?

This is how it is intended to be used (real-time tasks on the Cortex-M, Linux on the Cortex-A).

Nevertheless its 64-bit core is optimized for low-power, so it also has low performance.

If the applications intended to run under Linux are more demanding, one may need at least some SoC with Cortex-A55 cores (e.g. from NXP), if not one with medium-size cores, like the RK3588 (with quadruple Cortex-A76 + GPU + NPU + some Cortex-M) or one of the overpriced SoCs from Mediatek, Qualcomm or NVIDIA (these latter 3 have worse price/performance than Intel/AMD CPUs).

Unless a price under $100 is a condition, the easiest way to make a CV system for robotics is by using one of the very small computers that are available with Intel N100 CPUs (there are models much smaller than a NUC, either at a Pico-ITX size or even smaller, while prices are under $200).

Re: STM32 MCU family goes 64-bit with the STM32MP2x (Cortex-A35)

#13
post #6

Earlier quoted context omitted.

Well its a mixed 32/64 bit core, and I guess they want to emphasize the backcompat with STM32MP1 more than the 64bitness.

AMD Athlon 64 was also backwards compatible to 32 bity yet nobody was confused about that from the 64 in the name, that it would somehow only run 64 bit code.

It's more the reverse of that implication. E.g. 2 years from now a 64 bit only STM chip could well be released instead of a hybrid 32 bit and 64 bit that also is fully 32 bit compatible. That's not really a problem on backwards-compatibility focused x86 where ~20 years after AMD64 the newly launched 7950X still supports booting ~30 year old 16 bit MS-DOS (and maybe older, I haven't tried).

Re: STM32 MCU family goes 64-bit with the STM32MP2x (Cortex-A35)

#14

Does anyone know why some of the balls in the (render pics) are missing around the edges? Unrelated: Would this be suitable for a CV system eg in robotics? Eg do the realtime stuff on the Cortex-M, and run a linux + OpenCV/OpenVINO etc on the Cortex-A?

The balls are missing to enable making connections to inner balls in a board with fewer layers.

The outer balls take up space and so block the traces from inner balls. By strategically removing some of the outer balls, you create channels that can be used for routing taxes from the inner balls.

Re: STM32 MCU family goes 64-bit with the STM32MP2x (Cortex-A35)

#15

Does anyone know why some of the balls in the (render pics) are missing around the edges? Unrelated: Would this be suitable for a CV system eg in robotics? Eg do the realtime stuff on the Cortex-M, and run a linux + OpenCV/OpenVINO etc on the Cortex-A?

It all comes down to cost. These BGA chips have pins under the device unlike older packages like QFP or DIP. The pattern of missing pins is designed so it a fewer signal layers to bring out all the sigal connections in a typical PCB process. Devices with full grids would need more layers or tighter tolerances.

The appeal of STM32MP1 is you can put DDR momery with the chip on a 4 layer board. ST even provides the layout.

Re: STM32 MCU family goes 64-bit with the STM32MP2x (Cortex-A35)

#17

Still calling your new 64-bit chips STM32, just like your 32-bit chips, instead of STM64, feels like your branding/marketing team is asleep at the wheel or just non-existent. Even Nintendo figured that out ~30 years ago.

You have no idea the absolute shit show that semiconductor part naming is

And it's because of egos of marketing departments that think they know better than engineers.

I shit you not, Microchip has a over 400 page internal PowerPoint that covers decoding their schemes and they keep adding more.

Re: STM32 MCU family goes 64-bit with the STM32MP2x (Cortex-A35)

#18

Still calling your new 64-bit chips STM32, just like your 32-bit chips, instead of STM64, feels like your branding/marketing team is asleep at the wheel or just non-existent. Even Nintendo figured that out ~30 years ago.

Like win32?
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