4 ms·

Are there even any ARM Cortex-M chips that are ASIL-B rated or better?

detaro 5y ago
yes. ARM sells appropriate designs, and e.g. NXP offers some chips.
TaylorPhebillo 5y ago
I think the Cortex-R chips are more targeted here- I think the V8-R chips are designed specifically for automotive use, so I assume they have appropriate ratings.
- baybal2 5y ago
  There are very lazy car companies which simply specify "automotive certified" car chips for everything, including MCUs running window switches. So, don't be surprised $20 ARM-R based MCUs being used to do something trivial like driving window motor. I seen a few dashboard where there is an STM32 sitting connected to a single button, whose only duty is to register a key press, and burp something on the CanBus in response.
  - coryrc 5y ago
    I guarantee you no one is running $20 MCUs in trivial applications (in normal times). They're very cost-conscious.
  - hulitu 5y ago
    Every component ( resistors, transistors, microcontrollers, etc ) must be Automotive qualified (AEC-Q ). That's how you have a minimum standard. A button cannot communicate on the CAN bus that's why you need the microcontroller.
  - kortex 5y ago
    A) I doubt you need a $20 component to register a key press and do some canbus IO B) If you did have a $20 microcontroller for Canbus control of a window motor driver but it saved $19 in extra wiring/labor (driver controls usually route to all windows), provides reliable debounce, automated one-push-to-open, and allows things like holding keyless lock to close all windows, it's totally worth it.
  - sbierwagen 5y ago
    A big chunk of this crisis was caused by car manufacturers being insanely focused on cost cutting. Doing obviously dumb things with BOM isn't exactly a calling card of the automotive industry.
im_down_w_otp 5y ago
Looks like the Cortex-R52 and Cortex-R5, a CPU and MCU, respectively both have been ASIL-D (the highest rating) qualified. Which is fantastic frankly. There's a bunch of legacy PPC, MIPS, and TriCore tech that's just miserable to work with because of their ancient and/or bespoke & proprietary toolchains. So, really the automotive industry lacks excuses that I would buy for why they're not moving forward onto new platforms other than the institutional inertia and supply-chain entanglements that its prioritizing instead.

yes. ARM sells appropriate designs, and e.g. NXP offers some chips.

I think the Cortex-R chips are more targeted here- I think the V8-R chips are designed specifically for automotive use, so I assume they have appropriate ratings.

baybal2 5y ago
There are very lazy car companies which simply specify "automotive certified" car chips for everything, including MCUs running window switches. So, don't be surprised $20 ARM-R based MCUs being used to do something trivial like driving window motor. I seen a few dashboard where there is an STM32 sitting connected to a single button, whose only duty is to register a key press, and burp something on the CanBus in response.
- coryrc 5y ago
  I guarantee you no one is running $20 MCUs in trivial applications (in normal times). They're very cost-conscious.
- hulitu 5y ago
  Every component ( resistors, transistors, microcontrollers, etc ) must be Automotive qualified (AEC-Q ). That's how you have a minimum standard. A button cannot communicate on the CAN bus that's why you need the microcontroller.
- kortex 5y ago
  A) I doubt you need a $20 component to register a key press and do some canbus IO B) If you did have a $20 microcontroller for Canbus control of a window motor driver but it saved $19 in extra wiring/labor (driver controls usually route to all windows), provides reliable debounce, automated one-push-to-open, and allows things like holding keyless lock to close all windows, it's totally worth it.
- sbierwagen 5y ago
  A big chunk of this crisis was caused by car manufacturers being insanely focused on cost cutting. Doing obviously dumb things with BOM isn't exactly a calling card of the automotive industry.

im_down_w_otp 5y ago

Looks like the Cortex-R52 and Cortex-R5, a CPU and MCU, respectively both have been ASIL-D (the highest rating) qualified. Which is fantastic frankly. There's a bunch of legacy PPC, MIPS, and TriCore tech that's just miserable to work with because of their ancient and/or bespoke & proprietary toolchains. So, really the automotive industry lacks excuses that I would buy for why they're not moving forward onto new platforms other than the institutional inertia and supply-chain entanglements that its prioritizing instead.