STMicroelectronics
256 KB SRAM with Cortex-M4F FPU and DSP. Integrated BLE 5.3 and 802.15.4 radio enables wireless ML inference devices without external radio modules.
| Processor | ARM Cortex-M4F @ 64 MHz + Cortex-M0+ @ 32 MHz |
| Cores | 1 |
| Clock | 64 MHz |
| SRAM | 256 KB |
| Flash | 1 MB |
| FPU | single |
| Connectivity | Bluetooth 5.3 LE, 802.15.4 (Thread/Zigbee) |
| Key Features | Dual-core: M4F (application) + M0+ (radio stack), Integrated BLE 5.3 + 802.15.4 radio, Matter/Thread support, Ultra-low-power radio modes |
| Price | $4–$8 (chip), $15–$35 (dev board) |
2 dev boards available across PlatformIO registries.
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1024 KB RAM · 600 MHz
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1024 KB RAM · 600 MHz
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64 KB RAM · 64 MHz
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128 KB RAM · 64 MHz
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256 KB RAM · 64 MHz
RA6M5
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512 KB RAM · 200 MHz
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256 KB RAM · 120 MHz
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256 KB RAM · 120 MHz
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80 KB RAM · 72 MHz
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192 KB RAM · 168 MHz
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512 KB RAM · 216 MHz
STM32G4
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128 KB RAM · 170 MHz
STM32H5
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640 KB RAM · 250 MHz
STM32H7
STMicroelectronics
1024 KB RAM · 480 MHz
STM32L4
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128 KB RAM · 80 MHz
STM32L5
STMicroelectronics
256 KB RAM · 110 MHz
STM32U5
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786 KB RAM · 160 MHz
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