Is STM32F4 or i.MX RT1062 better for image classification?

i.MX RT1062 scores higher (85 vs 55) for image classification. The i.MX RT1062's 1024 KB SRAM at 600 MHz clearly outperforms the alternative. However, ecosystem fit and connectivity needs should also influence your decision.

What's the price difference between STM32F4 and i.MX RT1062?

STM32F4 chips cost $3-10, dev boards $10-30. i.MX RT1062 runs $6-12 per chip, $25-40 for dev boards. At volume, the STM32F4 offers better cost efficiency.

Can both STM32F4 and i.MX RT1062 use TensorFlow Lite?

Yes, the STM32F4 (cortex-m4f) supports TFLite Micro. The i.MX RT1062 (cortex-m7) also supports TFLite Micro.

Hardware Comparison

STM32F4 vs i.MX RT1062 for Image Classification

Winner: i.MX RT1062 (score 85 vs 55)

Specs Comparison

Spec	STM32F4	i.MX RT1062
Manufacturer	STMicroelectronics	NXP
Architecture	ARM Cortex-M4F @ 168 MHz	ARM Cortex-M7 @ 600 MHz
SRAM	192 KB	1024 KB
Flash	1 MB	8 MB
ML Acceleration	DSP, FPU	DSP, FPU
Connectivity	USB OTG FS	Ethernet, USB OTG HS/FS
Chip Price	$3-10	$6-12
Image Classification Score	55 (Good)	85 (Excellent)

Detailed Comparison

The i.MX RT1062 edges ahead for image classification with a compatibility score of 85 vs 55 for the STM32F4. However, each platform has distinct advantages depending on deployment requirements. Memory: The STM32F4 provides 192 KB SRAM, while the i.MX RT1062 offers 1024 KB. For image classification's 128 KB minimum requirement, the i.MX RT1062 offers more margin. Performance: The STM32F4 runs at 168 MHz (cortex-m4f, DSP) vs the i.MX RT1062 at 600 MHz (cortex-m7, DSP). The i.MX RT1062's higher clock provides faster inference throughput. Connectivity: STM32F4 offers USB OTG FS. i.MX RT1062 provides Ethernet, USB OTG HS/FS. Cost: STM32F4 chips run $3-10 (dev boards $10-30), while i.MX RT1062 chips cost $6-12 (dev boards $25-40). The STM32F4 is more cost-effective for volume deployments. Choose the STM32F4 when: cost optimization is critical, the STMicroelectronics ecosystem fits your toolchain, or hardware variety is important (105 PlatformIO boards). Choose the i.MX RT1062 when: you need maximum RAM headroom, fastest possible inference is required, the NXP toolchain is preferred, or you need crossover mcu (600 mhz cortex-m7).

Explore Each Platform

STM32F4 Hardware Guides

STMicroelectronics cortex-m4f — 192 KB SRAM, 168 MHz

i.MX RT1062 Hardware Guides

NXP cortex-m7 — 1024 KB SRAM, 600 MHz

FAQ

Is STM32F4 or i.MX RT1062 better for image classification?: i.MX RT1062 scores higher (85 vs 55) for image classification. The i.MX RT1062's 1024 KB SRAM at 600 MHz clearly outperforms the alternative. However, ecosystem fit and connectivity needs should also influence your decision.
What's the price difference between STM32F4 and i.MX RT1062?: STM32F4 chips cost $3-10, dev boards $10-30. i.MX RT1062 runs $6-12 per chip, $25-40 for dev boards. At volume, the STM32F4 offers better cost efficiency.
Can both STM32F4 and i.MX RT1062 use TensorFlow Lite?: Yes, the STM32F4 (cortex-m4f) supports TFLite Micro. The i.MX RT1062 (cortex-m7) also supports TFLite Micro.

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